In \(\triangle { ABC } \) two sides, AB and BC are equal. Side AC has a length of 5, and the perimeter of \(\triangle { ABC } \) is 13. If the measure of angle ABC is \(x\), which of the following must be true about \(x\)?
(A)\(x < 60\) (B)\(60 < x < 90\) (C)\(x = 90\) (D)\(x > 90\) (E)It cannot be determined from the information given.
B