The Triangles Are Similar $a = 14$ $b = 21$ $c = 10$

Multiple Choice

The triangles are similar. Find the missing side, angle or value of the variable.
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$a = 14$
$b = 21$
$c = 10$
$d = 15$
$e = 20$

A) $x = 28$
B) $x = 26$
C) $x = 20$
D) $x = 35$