ANYONE WHO ANSWERS THIS GETS BRAINIEST!! THANK YOU!!! :)

When adding 24.72 to a certain number, the sum is 28.42, as seen below. What number should go in the box to complete the addition problem? (The little box with the question mark is the missing number.)


THIS IS THE BOX:

24.72

+ [?].7

= 28.42


ANSWERS:

A: 2

B: 3

C: 11

D: 14


All answers are appreciated.