Which statement is TRUE regarding activation of the amygdala in normal healthy people?

Which statement is TRUE regarding activation of the amygdala in normal healthy people?

a) 

Higher amygdala activation is correlated with worse memory.

b) 

Higher amygdala activation is correlated with better memory.

c) 

The amygdala is activated by unpleasant pictures but not pleasant pictures.

d) 

Amygdala activation is associated with encoding but not recognition of emotionally arousing pictures.