Answer:
B
Explanation:
The square root of 38 is not a perfect square so, we find which it is closer to.
6 squared is 36 and 7 squared is 49.
The square root of 38 is much closer to 6.
It is B since it is much closer.
It can't be A since it's smaller than 6.
C is too far away from 6.
D is too close to 7.
Hope this helps :)