After a couple of calculations and couldn't find the correct answer from the selections, I gave up and looked at the back for the solution. I searched the forum in regards with the problem and could not find a previous post. The solution didn't consider the 0.9 pf of the load to find the complex impedance. From the comment of Table of 9 of NEC, the pf was included if different from 0.85pf. Perhaps, am I missing something?