The Female Sex Hormone Estrogen Is Involved in Memory Because

The female sex hormone estrogen is involved in memory because

A) it helps to store more information than testosterone, the male sex hormone.
B) women have larger hippocampi than men.
C) it helps to build and maintain synapses between neurons in brain areas known to be involved in memory.
D) it causes the neurons to fire more often, exchanging information at a superior rate and intensity, and thus building better memories.