Answer: The correct option is (A) 58.
Step-by-step explanation: We are given to find the length of JK in the given figure.
From the figure, we note that
JKLM is a parallelogram. So, the opposite sides of JKLM will be parallel and congruent.
Also, JK = 3x - 14 and LM = 58.
Since JK and LM are the opposite sides of the parallelogram JKLM , so we must have

Therefore, the length of JK is given by

Thus, the length of JK is 58 units.
Option (A) is CORRECT.