Explanation
In order to exercise manual control over the sensor upgrade process, as well as prevent unauthorized users from uninstalling or upgrading the sensor, the administrator should set the Sensor version to fixed and turn on the Uninstall and maintenance protection setting in the Sensor Update Policy. This will allow the administrator to specify which sensor version will be used by the hosts using this policy, and also require a maintenance token to uninstall or upgrade the sensor. The other options are either incorrect or not sufficient to meet this criteria. Reference: CrowdStrike Falcon User Guide, page 38.

Explanation
The page that provides a count of sensors in Reduced Functionality Mode (RFM) by Operating System is Sensor Health. The Sensor Health page allows you to view and monitor the health and status of all sensors in your environment. You can use this page to identify any sensors that have issues or errors, such as RFM, which is a mode that limits the sensor's functionality due to license expiration, network connectivity loss, or certificate validation failure. You can filter the sensors by operating system, sensor version, last seen date, health events, detections, and preventions3.
References: 3: How to Become a CrowdStrike Certified Falcon Administrator

Explanation
The most appropriate action to take if you wanted to prevent a folder from being uploaded to the cloud without disabling uploads globally is to create a Custom IOC entry. A Custom IOC (indicator of compromise) entry allows you to define custom rules for detecting or preventing malicious activity based on file hashes, file paths, IP addresses, or domains. You can use regex (regular expression) syntax to create a Custom IOC entry that matches the folder path that you want to block from being uploaded to the cloud1.
References: 1: Falcon Administrator Learning Path | Infographic | CrowdStrike

Explanation
The role that allows a user to connect to hosts using Real-Time Response is Real Time Responder - Active Responder. This role allows users to use the "Connect to Host" feature to gather additional information from the host, as well as execute commands and scripts on the host. The other roles do not have this capability.
Reference: [CrowdStrike Falcon User Guide], page 18.