Task: Question Answering
Input (English): Question: Albert and Bob are painting rooms at constant, but different rates. Albert takes 1 hour longer than Bob to paint n rooms. Working side by side, they can paint a total of 3n/2 rooms in 4/3 hours. How many hours would it take Albert to paint 3n rooms by himself?

 Option A: 6

 Option B: 9

 Option C: 11

 Option D: D.13

 Option E: 15
Output (English): Option A