Mary has 2 puppies,9 birds, 4 fishes.How many pets are there in all?  Choose the correct option.
A) 12
B) 08
C) 19
D) 15
E) 20
2+9+4= 
<gadget id="calculator">2+9+4</gadget>
<output>15</output>
15. Answer is 15
<result>D</result>
Mary has 2 puppies,9 birds, 4 fishes.How many pets are there in all?