A. Yes. Many of the networks have control panels that can enable or disable access to personal information.
B. Yes. I can choose to remain mostly private or public on most social networks.
C. Yes. I can control access to my profile.
D. No. Too much information is readily accessible via search engines.
E. No. Ads are targeted using analytics. I am not sure what information 3rd parties have.
F. No. Most apps require access to information without disclosing what they do with that information.