If \(q\) is one root of the equation \(x^2 + 18x + 11c = 0,\) where \(-11\) is the other root and \(c\) is a constant, then \(q^2-c^2 =\)
A) 98
B) 72
C) 49
D) 0
E) It can't be determined from the information given.
Answer: D
Source: Princeton Review