What is the missing number in the fourth triomino?

A.
2

B.
3

C.
9

D.
11

http://static.k12.com/calms_media/media/1419500_1420000/1419686/1/2624ba12ad5d2199f46a2f0cd41341272f9a8d6b/FGA_130923_261527.jpg

Question

What is the missing number in the fourth triomino?		
  

 
 A.
2
 
 B.
3
 
 C.
9
 
 D.
11

http://static.k12.com/calms_media/media/1419500_1420000/1419686/1/2624ba12ad5d2199f46a2f0cd41341272f9a8d6b/FGA_130923_261527.jpg

anonymous · Answer

What is the missing number in the fourth triomino? A. 2 B. 12 C. 13 D. 17 http://static.k12.com/calms_media/media/1419500_1420000/1419689/1/ebd0312005471cf59523e45a8469d698e20fbb9a/FGA_130923_261530.jpg

anonymous · Answer

Today I have to do 19 math 
32 vocabulary
33 grammar
11 reading
8 Earth Science
and 7 American Histories 

I need help fast