Dennis is choosing a pair of socks and a pair of shoes. For the socks, he can choose from blue, red, and black, and for the shoes, he can choose from boots, sandals, and loafers. What is the sample space of one pair of socks and one pair of shoes?

A) {blue boots, blue sandals, blue loafers, red boots, red sandals, red loafers, black boots, black sandals, black loafers}
B) {blue, red, black, boots, sandals, loafers}
C) {blue, red, black, boots, sandals, loafers, blue boots, red boots, black boots, blue sandals, red sandals, black sandals, blue loafers, red loafers, black loafers}
D) {2 blue socks, 2 red socks, 2 black socks, 2 boots, 2 sandals, 2 loafers}