A company wants to allow access to social media sites but block file uploads through...

The correct answer is A. Allowing social media access while blocking file uploads requires two types of control: application/site recognition and content/action awareness. Application Control identifies and controls access to social media applications and services. Content Awareness can match data/content characteristics and help enforce restrictions on what is transferred, such as files or sensitive content. Option B is wrong because NAT changes addresses and ports; it does not control social media upload behavior. Option C is unrelated to the upload-control requirement: Identity Awareness can restrict access by user or group, and VPN secures remote/site connectivity, but they do not directly block uploads on social platforms. Option D is also not the best answer: HTTPS Inspection may be needed to see encrypted upload traffic, and Threat Emulation can inspect suspicious files, but the core policy combination is Application Control plus Content Awareness. Reference topics: Application Control, Content Awareness, Access Control Policy, application/site and content-based enforcement.