In order for a person to be classified as having major depressive disorder, he or she must experience a depressive episode that lasts at least
a) one week.
b) two weeks.
c) one month.
d) two months.

Technician a says the harmonic balancer may be attached to the crankshaft using a woodruff key and center bolt. technician b says the harmonic balancer may be attached to the crankshaft using a square key and center bolt. who is correct? choose one answer. a. technician a b. technician b c. both technician a and technician b d. neither technician a nor technician b