Suppose that if there are n users of a network, the value of the membership is proportional to n(n − 1). If the value of a network to a single user is $1 for each other user on the network, then a network of size 100 has a value of:
a. $9,000.
b. $10,100.
c. $9,900.
d. $9,500.
e. $10,000.