During the first few weeks of law school,students were observed to have stronger immune systems if they

A) exhibited an external locus of control.
B) were optimistic.
C) had high blood sugar levels.
D) utilized biofeedback.

Optimistic

Having a positive, hopeful outlook on future events, believing in the likelihood of favorable outcomes.

External Locus of Control

The belief that outcomes in one's life are determined by external forces or factors beyond one's personal control.