Some Materialist Empiricists Are Either Libertarians or Hard Determinists $\lor$

Multiple Choice

Some materialist empiricists are either libertarians or hard determinists. But no empiricist is a hard determinist. So some materialists are libertarians.
-Which of the following propositions is an immediate (one-step) consequence in M of the given premises?

A) (Mx • Ex) • (Lx $\lor$ Dx)
B) (Mc • Ec) • (Lc $\lor$ Dc)
C) Ex ⊃ ∼Dc
D) En ⊃ ∼Dx
E) Mc • Ec