Both Beth and Alex Have OCD

Both Beth and Alex have OCD. Beth is being treated with mindfulness meditation practices and cognitive therapy. Alex is using only cognitive therapy. Based on current research,

A) Beth will get more relief from her OCD than Alex will.
B) both are receiving treatment for OCD so they should both improve the exact same amount.
C) Alex will get more relief from his OCD than Beth will.
D) neither will find relief with the therapies they are employing. They must use biological treatments to see any relief of OCD symptoms.