A: There is very little reason you should trust a VPN provider with your internet privacy. The vast majority of VPN providers are operating on the other side of ethics, or are outright criminal organizations.
On the other hand, why should you trust anyone (priests come to mind, as do politicians, police, used car dealers, your wackadoodle ex, etc.)?
But you can do your due diligence. Research reviews, BBB records, how long they have been in business, etc. My current VPN favorite is NordVPN.com.