The term just noticeable difference is synonymous with ______ threshold

The fact that HM displayed some forms of___without being consciously aware of his newly acquired skills suggest that the brain forms at least two kinds of memory.

Fill in the blank(s) with the appropriate word(s).

In regard to friends who spend a lot of time discussing personal problems,

A) both boys and girls show increased levels of depression. B) boys, but not girls, show increased levels of depression. C) girls, but not boys, show increased levels of depression. D) both boys and girls show decreased levels of depression.