Lilly has 10 fish and Rosy has 11 fish. In total, how many fish do they have in all?	Select the correct option.
A) 19  B) 20  C) 21  D) 22  E) 23
10+11= 
<gadget id="calculator">10+11</gadget>
<output>21</output>
21   The answer is 21.
<result>C</result>
Lilly has 10 fish and Rosy has 11 fish. In total, how many fish do they have in all?