Albert is 2 times Mary’s age and 4 times as old as Betty. Mary is 14 years younger than Albert. How old is Betty?  Choose the correct answer:	A) 5	B) 7	C) 10	D) 15	E) 18

Rationale: "a = 2 m = m + 14 m = 14 a = 28 a = 4 b , and so b = 7 the answer is b ."
Answer: B