B. It's a mind-altering substance that makes it unsafe to perform some tasks, ergo it should be regulated. As a parent, I don't want it to be possible for my kid to walk into 7-11 and buy pot, just like I don't want it to be possible for him to walk in and buy alcohol or cigarettes.

I don't want people driving while high at the level it would occur if there were absolutely no deterrent.

Given that marijuana use is a net negative for society at large (w/ regard to productivity) I'd support severe restrictions on advertising. More severe than current restrictions on cigarettes and alcohol. I'd also apply those "more severe" restrictions to tobacco and alcohol.