Task: Question Answering
Input (English): When heated, mercuric oxide decomposes to form liquid mercury and oxygen. A scientist heated 10 grams (g) of mercuric oxide and formed 9.3 grams of liquid mercury. How many grams of oxygen were formed?  
 (A) 0.7 g (B) 9.3 g (C) 10.0 g (D) 19.3 g
Output (English): A