Answer:
The correct answer is option b.
Explanation:
Mountain River Adventures offers white water rafting trips down the Colorado River.
It costs the firm $100 for the first raft trip per day, $120 for the second, $140 for the third, and $160 for the fourth.
The market price for a raft trip was $120 but has now increased to $150.
The producer surplus is the difference between the price that a producer is willing to receive and the price he actually gets.
The increase in producer surplus due to the increase in price will be
= $150 -$120
= $70