11. LMNO is a parallelogram. If \( N M = 22 \) and \( O L = 3 x + 8 \) , what property of parallelogram should be applied to find the measure of \( \overline { O } \overline { L } ? { } ^ { * }\)
A. diagonals bisect each other
B. opposite sides are congruent
C. opposite angles are congruent
D. consecutive angles are supplementary