Of course, it is A, and the inclusion of choice C is an insult to the intelligence of this forum.
Worse than all of these is the presence of those who a) voluntarily sign the WPA contract, which requires WADA compliance, b) have full access to and knowledge of the WADA list of banned substances, c) violate those guidelines, and d) after they break the rules, don't think those guidelines should apply to them. Anyone unprepared to comply with WADA guidelines should not sign the WPA contract.
Discussion of what WADA should test for can be very constructive. Steps can be taken to encourage WADA to change its guidelines for banned substances. It does seem likely that WADA will make some changes down the road, but until then, players must observe current rules.
A philosophy of "I'll follow the rules I agree with and violate the ones I disagree with" can have serious consequences for an athlete in any sport.
Rubber stamping behavior that might compromise the image of our sport is not just a long-term problem that has been in play for decades in pool but also a disturbing reality here on AZB. No matter how badly a player misbehaves, the apologists always come out in droves here on AZB.
Would it do our sport any good if a dozen top players played while under the influence of weed and paying attendees noticed? No, pool's image would take a small hit. In any sport, those who compete while under the influence of substances are displaying a lack of professionalism. I've seen it happen countless times in my many years around the game, and I've seen players smoking weed in the plain sight of paying customers dozens of times. Pool, a sport with an image problem that it's trying to put behind it, can do without players who play under the influence.
No other pro sports (other than maybe FIFA in European leagues) apply WADA to their pro leagues because it leads to these types of headaches. Pro sports, including those that are in the Olympics, come up with their own testing rules for pro events because you can't apply Olympic testing protocols to routine pro events every weekend.
I also think your view of image is outdated. Pool's image today is one of grandpas playing at the VFW. Nothing wrong with that but it doesn't get young people excited or bring in advertising dollars. Pretending that pool players are Olympians is like "putting whipped cream on a hot dog."