In the parallelogram \(ABCD\) above, \(AD = 12.\) If the area of triangle \(ABE\) is 3/8 the area of parallelogram

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In the parallelogram \(ABCD\) above, \(AD = 12.\) If the area of triangle \(ABE\) is 3/8 the area of parallelogram \(ABCD,\) then what is the length of \(EC?\)

A. 3/2
B. 2
C. 8/3
D. 3
E. 4

[spoiler]OA=D[/spoiler]

Source: Princeton Review
Source: — Problem Solving |