Tom, the monopoly provider of a town's cable TV service, has set the current cable subscription price at $20 per month. To attract one more subscriber, he needs to lower his price to $19.95. What is of the effect on Tom's marginal revenue from that additional subscriber?

a. Tom's marginal revenue equals $19.95

b. Tom's marginal revenue is greater than $19.95

.c. Tom's marginal revenue is less than $19.95

.d. Tom's marginal revenue is between $19.95 and $20.