If the Marginal Cost for Dinky's Donuts to Advertise One

Multiple Choice

If the marginal cost for Dinky's Donuts to advertise one additional day each week in the local newspaper is $200, then Dinky's Donuts should advertize that additional day

A) only if the marginal benefit the company receives each week is greater than $200 plus an acceptable profit margin.
B) as long as the marginal benefit the company receives each week is just equal to or greater than $200.
C) as long as the weekly marginal cost does not rise.
D) until the marginal benefit the company receives reaches zero.