your answer is D. If she can paint half the room in 3/4 of an hour then you can assume it will take her another 3/4 to paint the other half. 3/4 = .75 add another 3/4 to get 1.5 which then = 6/4 hope this helps :)
If Marisa painted 1/2 of her bedroom in 3/4's of an hour, it would take her the same amount of time to paint the other half. 3/4 + 3/4 = 6/4. Your answer would be 6/4ths.
