21. If E is the midpoint of AD, what is the length of EB?( ∠D = 60°( ... ...

If E is the midpoint of AD, what is the length of EB?

(1) ∠D = 60°

(2) DC = 4


(A) if statement (1) ALONE is sufficient to answer the question but statement (2) alone is not sufficient;
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Nova Press: Set B - Data Sufficiency Practice