Kylie can clean 1/2 of a house in 1/4 of an hour. If she continues this rate, how much of the house can Kylie clean per hour?
a) 1/3 of the house per hour
b) 1/12 of the house per hour
c) 1/6 of the house per hour
d) 1/2 of the house per hour
e) 2/3 of the house per hour