Refer to the Figure Below,which Shows Marginal Benefits (MB)and Marginal

Multiple Choice

Refer to the figure below,which shows marginal benefits (MB) and marginal cost (MC) of activity A: If the decision maker is choosing 300 units of activity A,

A) this level maximizes net benefits.
B) if the activity is increased by one unit,net benefits will increase by $20.
C) if the activity is decreased by one unit,net benefits will decrease by $20.
D) both b and c
E) all of the above