Suppose a consumer is willing to pay $140 for a pair of athletic shoes but finds the shoes on sale for $100 per pair. The minimum price the seller wants for each pair of athletic shoes is $75. If the consumer buys a pair of these athletic shoes for $90, the amount of consumer surplus is $____ and the amount of producer surplus is $____.

A. 50; 25

B. 30; 15

C. 40, 25

D. 50; 15

E. 40; 15