In the figure given below, ABCD is a rectangle. The area of the isosceles right triangle ABE = 7 $$cm^2$$ ; EC = 3(BE). The area of ABCD (in $$cm^2$$) is

A

21 $$cm^2$$

B

28 $$cm^2$$

C

42 $$cm^2$$

D

56 $$cm^2$$