What capability should an Integration Architect consider if there is a need to synchronize data changed in Salesforce to a 3rd party with a JSON-based API endpoint?

A company is planning on sending orders from Salesforce to a fulfillment system. The integration architect has been asked to plan for the integration.
Which two questions should the integration architect consider?
Choose 2 answers

Universal learning (UC) is embarked on Salesforce transformation journey, UC will decommission the legacy CRM system and migrate data to Salesforce. The data migration team asked for a recommendation to optimize the performance of the dataload to Salesforce.
Which approach should used to meet the requirement?

An enterprise customer that has more than 10 Million customers has the following systems and conditions in their landscape:

A company needs to be able to send data from Salesforce to a home grown system behind a corporate firewall.
The data needs to be pushed only one way and doesn't need to be sent in real time. The average volume is 2 million records per day.
What should an integration architect consider when choosing the right option in building the integration between the external system and Salesforce?