Given that the length a < b, what is the order of the angles ∠ABC, ∠ACB, and ∠CAB from least to greatest?
A) ∠ACB, ∠CAB, ∠ABC
B) ∠ABC, ∠CAB, ∠ACB
C) ∠CAB, ∠ABC, ∠ACB
D) ∠CAB, ∠ACB, ∠ABC
