In the Above Decision Tree,Matthew Picks First and Dean Picks

Multiple Choice

In the above decision tree,Matthew picks first and Dean picks second.Matthew and Dean both know the payoffs to each choice for both themselves and each other.
-From the decision tree above,it is clear that

A) Dean will always select the upper branch at either Y or Z.
B) Matthew will always select Z.
C) Dean will always select the lower branch at either Y or Z.
D) Matthew does not have a clear preference for Y or Z.
E) Dean hopes Matthew will select Y.