When a firm seeks to minimize the costs of production of a given level of output, what does itNOTneed to know?

Question 9 options:

a) The technically efficient combination of inputs

b) It's profit-maximizing level of output

c) The economically efficient combination of inputs

d) It's production function

e) None of the above - it needs to know them all.

I am confused between b and e. I know that maximum level of profits does not matter but here we are talking about profit maximizing level of output.