Sebastian could be engaging in the BYB phenomenon at the office when he explains to coworkers how he ________.

A) plans to remove mites from his mattress
B) make suggestions for updating the purchasing system
C) appreciates being a member of his team
D) would like more first-hand information about the company fitness club

​The main reason(s) monopolies can earn positive profits for a while is(are)

A) ​assets cannot quickly move in and out of the industry when demand fluctuates
B) an increase in demand does not lead to entry of firms to absorb the extra demand
C) both A&B
D) ​none of the above