If the ratio of a to b is 8 to 3 and the ratio of b to c is 1 to 5, what is the ratio of a to c? Choose the most appropriate option:
A) 8 / 15	B) 1 / 3	C) 2 / 5	D) 4 / 5	E) 7 / 6

Rationale: "a : b = 8 : 3 - - 1 b : c = 1 : 5 = > b : c = 3 : 15 - - 2 from 1 and 2 , we get a : c = 8 : 15 answer a"
Answer: A