Directions: This question presents a sentence, all or part of which is underlined. Beneath the sentence you will find five ways of phrasing the underlined part. The first of these repeats the original; the other four are different. If you think the original is the best, choose the first answer; otherwise choose any one of the others.

He called the resulting system Thought Field Therapy and began training the therapists in using an algorithms and diagnosing the underlying problems before the treatment might begin.

began training the therapists in using an algorithms and diagnosing the underlying problems before the treatment might begin

began to train the therapists to use algorithms and diagnosing the underlying problems before the treatment would begin

began training the therapists in using algorithms and diagnosing underlying problems before the treatment could begin

began training the therapists in how to use algorithms and diagnose underlying problems before the treatment can begin

began training the therapists in using algorithms and diagnosing underlying problems till the treatment should begin