Explanation
When a host is placed in Network Containment, the host machine is unable to send or receive network traffic except to/from the Falcon Cloud and any resources allowlisted in the Containment Policy. This allows users to isolate a host from the network, while still allowing it to communicate with the Falcon Cloud and other essential services. The other options are either incorrect or not true of Network Containment.
Reference: CrowdStrike Falcon User Guide, page 40.

Explanation
The option that controls the speed in which your sensors will receive automatic sensor updates is Sensor Update Throttling. Sensor Update Throttling allows you to limit the number of sensors that can download a new sensor version per hour. This way, you can avoid network congestion or bandwidth issues caused by simultaneous sensor updates. You can configure the Sensor Update Throttling setting in the Sensor Update Policy for each platform1.
References: 1: Falcon Administrator Learning Path | Infographic | CrowdStrike

Explanation
The option that describes the relationship between Sensor Update policies and Operating Systems is that a Sensor Update policy must be configured for each Operating System (Windows, Mac, Linux). This option is essentially a repetition of question 141 and its answer. Sensor Update policies are specific to each operating system type, as different operating systems have different sensor versions, features, and requirements. Therefore, you need to create and assign separate Sensor Update policies for each operating system type in your environment1.
References: 1: Falcon Administrator Learning Path | Infographic | CrowdStrike

Explanation
https://www.crowdstrike.com/blog/tech-center/how-to-manage-policies-in-falcon/