Alice offers to sell her computer, monitor, and printer to Bradley for $300. Bradley says he will accept provided that Alice includes her word processing software. Alice says, "OK, I accept." What is the status of their discussions.

a) There is a valid contract for only the computer, monitor, and printer.

b) There is no contract, because Bradley has made a counteroffer.

c) There is no contract, because the time for delivery has not been decided.

d) There is a valid contract for the computer, monitor, printer, and the software.