Craig's sales manager has just told the group that all sales in the month of September will earn an extra $5\%$ commission. The team gets right to work, being motivated by a$($n$)$:

a$.$

Bribe

b$.$

Intrinsic reward

c$.$

Physiological need

d$.$

High need for power

e$.$

Hygiene factor

f$.$

Extrinsic reward