Repeatedly Cramming for Exams, So That You're Under a State

Repeatedly cramming for exams, so that you're under a state of chronic stress, instead of studying in smaller increments throughout the semester can actually reduce your ability to retain the information. This is supported by which of the following neurological phenomena during chronic stress?

A) high levels of circulating cortisol levels causes hippocampal dendrites to shrink
B) high levels of circulating cortisol levels causes dendrites in the amygdala to shrink
C) high levels of circulating cortisol inhibit the activity of excitatory neurotransmitter
D) high levels of circulating cortisol stimulate inhibitory neurotrasmitter release
E) more than one of the above