After the contractual dispute between the organizations had been resolved, the junior manager who proposed that they turn to professional mediation and saved her organization millions of dollars was promoted and received a bonus.

A. they turn to professional mediation and saved

B. they turned to professional mediation and saved

C. they turn to professional mediation and save

D. the organizations turn to professional mediation and save

E. the organizations turned to professional mediation and saved

OA is A.

The verb "turn" should not be in the past time? I mean, the correct option should not be B?