Please answer this question and explain ur answer/numbers. T benefit, question, numbers, market

krause2

Please answer this question and explain ur answer/numbers.
Thanks!
Q.
In a competitive market, the gains to society are maximized under which of the conditions described below by marginal benefit, marginal cost, producer surplus, and consumer surplus, respectively?
A) $2.50; $2.50; $35; $35.
B) $1.00; $1.00; $15; $15.
C) $1.50; $1.50; $45; $30.

Nishant1

I get it. Thanks!

leadcfa

45+30 = 75>70>30
You simply take the sum of the consumer and producer values. Larger is better.

needhelp1700

I get the fact that MB=MC, but how do you know that at $45, producer surplus is maximized and that at $30, consumer surplus is maximized?