Which of the Following Does the Text NOT Mention in the Discussion

Which of the following does the text NOT mention in the discussion of the ways in which drugs can interfere with synaptic transmission?

A) blocking a receptor site and preventing the neurotransmitter from acting
B) mimicking a particular neurotransmitter and producing the same effect
C) increasing the length of time a neurotransmitter remains in the synaptic gap, strengthening its effects
D) bonding with the neurotransmitter and changing its molecular weight and shape