The Figure Below Represents a Metabolic Pathway,what Happens If Enzyme₂

The figure below represents a metabolic pathway,what happens if Enzyme₂ is defective and nonfunctional?

A) Product Z would increase in amount.
B) Substrate Y would not be metabolized.
C) Substrate X would not be metabolized.
D) Substrate X would increase in amount.
E) Substrate X is destroyed.