Final answer:
The measure of angle W is also 68° if it is related to the same set of parallel lines and a transversal as angle O, due to the properties of parallel lines and transversals.
Step-by-step explanation:
The question involves finding the measure of angle W given that lines AB and CD are parallel and the measure of angle O is 68°. Assuming that W is an angle related to the same set of parallel lines and a transversal, if the measure of O is 68°, and lines AB and CD are parallel, angle W would also measure 68° if W is corresponding, alternate interior, or co-interior with O making use of alternate interior angle theorem, corresponding angle postulate, or co-interior angle theorem respectively. Hence, the correct choice is a) 68°.