Task: Question Answering
Input (English): Question: At a certain diner, Joe ordered 3 doughnuts and a cup of coffee and was charged $ 2.25. Stella ordered 2 doughnuts and a cup of coffee and was charged $ 1.80. What is the price of 2 doughnuts?

 Option A: $ 0.55

 Option B: $ 1.00

 Option C: $ 1.10

 Option D: $ 0.90

 Option E: $ 1.80
Output (English): Option D