Answer:

C. 15

Step-by-step explanation:

since the length is 12 meters more than the width, the length must be higher than 12. On the choices given, only 15 and 16 is higher that 12.

the area must be less than 50 m^2, meaning to say, the length and width's product must be less. that 50.

First, try the 15, 15 - 12 = 3

L = 15

W = 3

15 × 3 = 45, 45 is less than 50

then try 16, 16 - 12 = 4

L = 16

W = 4

16 × 4 = 64, 64 is more than 50.

thus the correct answer is C. 15

(rip engrish :) )