Robin is a 31-year patient with a history of obsessive-compulsive disorder (OCD) being treated with cognitive-behavioral therapy. She is currently 3 months pregnant, and the severity of her obsessions and compulsions have increased during her pregnancy. Which pharmacotherapy would be the preferred option for Robin?

a) Fluoxetine
b) Lorazepam
c) Paroxetine
d) Sertraline