Lines and m are intersected by transversal t. ∥ m. There are two parallel horizontal lines l and m intersected by another line t making angles 1 and 3 with l and 5, 7 with m. 1 ,4 and 2 , 3 are opposite angles at the point of intersection of l and t. 5, 8 and 6, 7 are opposite angles at the point of intersection of m and t.

Which of the following angles are supplementary to ∠4? Select all that apply.
A. ∠5
B. ∠6
C. ∠7
D. ∠8