Explanation
Integrated Project Planning and Design is a prerequisite for healthcare facilities under LEED v4. The intent is to maximize opportunities for the adoption of cost-effective integrated green design and construction strategies as early as pre-design1.
References:
LEED v4 | HPAC Engineering1

Using staggered studs is the best answer because it can improve acoustic separation while still allowing the wall assembly to include insulation needed for energy performance. Staggered-stud walls reduce direct sound transmission paths through the framing, which helps limit noise transfer between spaces.
This supports Indoor Environmental Quality by improving acoustic comfort and privacy. At the same time, wall cavities can be insulated to reduce heat transfer and help meet energy code requirements.
Single-glazed windows usually perform poorly for both energy efficiency and sound control. A high U- value means higher heat transfer, which is not desirable for energy performance. Removing insulation is incorrect because it worsens both thermal performance and sound attenuation. This strategy shows how envelope design can create LEED synergies.

As of 1996, the Montreal Protocol banned the production of chlorofluorocarbons (CFCs), a chemical compound known to have ozone-depleting potential. CFCs are synthetic substances that were widely used as refrigerants, propellants, solvents, and foam-blowing agents. CFCs have high ozone depletion potential (ODP), which means they can destroy the ozone layer that protects the Earth from harmful ultraviolet radiation. The Montreal Protocol is an international treaty that aims to protect the ozone layer by phasing out the production and consumption of ozone-depleting substances. The Montreal Protocol banned the production of CFCs in 1996 fordeveloped countries and in 2010 for developing countries1 . References: LEED v4 Green Associate Candidate Handbook1, UNEP's Montreal Protocol

This combination of credits supports ecosystem health and resource conservation. A site assessment informs sustainable design decisions, while reducing outdoor water use with native species minimizes irrigation needs, aligning with LEED goals.

Explanation
The Forest Stewardship Council (FSC) is a third-party verification organization that certifies forest products that are sourced from responsibly managed forests that meet environmental, social, and economic standards12. FSC-certified wood products are considered environmentally preferable products under the LEED v4 Materials and Resources category, as they reduce the negative impacts of deforestation, habitat loss, and biodiversity loss34.
References:
What is FSC? | FSC International1
Forest Stewardship Council - Wikipedia2
LEED v4: Building Design + Construction Guide - U.S. Green Building Council3 Credit's Supporting LEED's Materials and Resources Category | Legrand4