Find the Angles a and ACB and the Length CD

Multiple Choice

Find the angles A and ACB and the length CD in the roof in the illustration below, where AC = BC. Round lengths of sides to three significant digits and angles to the nearest tenth of a degree.

A) ∠A = 21.1°, ∠ACB = 132.2°, CD = 2.65 ft
B) ∠A = 20.4°, ∠ACB = 139.2°, CD = 2.78 ft
C) ∠A = 20.4°, ∠ACB = 139.2°, CD = 3.25 ft
D) ∠A = 21.6°, ∠ACB = 127.2°, CD = 2.71 ft
E) ∠A = 19.9°, ∠ACB = 144.2°, CD = 3.25 ft