The amounts of time that three secretaries worked on a special project are in the ratio of 1 to 2 to 5. If they worked a combined total of 120 hours, how many hours did the secretary who worked the longest spend on the project?	Pick one:
A) 80
B) 70
C) 75
D) 16
E) 14

Rationale: "8 x = 120 = > x = 15 therefore the secretary who worked the longest spent 15 x 5 = 75 hours on the project option ( c )"
Answer: C