Frederick w. taylor:
a. authored the bill on reclamation for the western states.
b. was an oregon reformer responsible for many progressive measures enacted there.
c. was founder of the national child labor committee.
d. was an efficiency expert.
e. was the progressive editor of arena.

D. Was an efficiency expert is the correct answer.

Explanation:

Fredrick Taylor was an American engineer who tried to improve the industrial efficiency. He wrote the book shop management. He used to believe that management should be studied as a discipline, instead of trade unions the workers should participate with each other and the best results in the factory could be received only with a partnership between a trained and qualified management. He coined the term scientific management in the article The Principle of Scientific management that was published in 1911.

its c not d   tell me if that´s correct