Answer:
c.
Explanation:
Please note that the angle A and B are somewhat close to 45deg, so we expect AC and BC to be close in length.
We can drop answer a on that basis.
We can also drop abswer d on the basis that AC is longer than AB there and that cannot be the case in a right triangle.
We can verify that for both b and c the Pythagoras theorem holds, so we need to choose the answer that fits the angles A and B. Te can check the tan of the angle to get the ratio between BC and AC.
tan(48.8deg) ~= 1.1423
1.6/1.4 ~= 1.1429; close enough.
So we choose answer c.