Suppose a traveler wanted to visit a museum, an art gallery, and the state capitol building. 45-minute tours are offered at each attraction hourly from 10 a.m. through 3 p.m. (6 different hours). Solve the problem, disregarding travel time.

In how many ways can the traveler visit all three places in one day?
Select one:
a. 120
b. 60
c. 15
d. 30