A, B, C, D and E are 5 consecutive points on a straight line. If BC = 3CD, DE = 7, AB = 5 and AC = 11, what is the length of AE?  Choose the most appropriate option:
A) 18
B) 19
C) 20
D) 21
E) 22
AC = 11 and AB = 5, so BC = 6.   BC = 3CD so CD = 2.   The length of AE is AB+B20+20D+DE = 5+6+2+7= 
<gadget id="calculator">5+6+2+7</gadget>
<output>20</output>
20   The answer is 20.
<result>C</result>
A, B, C, D and E are 5 consecutive points on a straight line. If BC = 3CD, DE = 7, AB = 5 and AC = 11, what is the length of AE?