Which form corresponds to the verb fertis when changed to imperfect and subjunctive?

The verb "fertis" is the second person plural of "ferre," which means "to carry" or "to bear," in the present indicative active voice. To change "fertis" to the imperfect subjunctive, you need to change it to its appropriate form based on the rules of Latin verb conjugation.

The imperfect subjunctive of "ferre" is formed from the infinitive "ferre" with the addition of the appropriate ending. The base of "ferre" used in the imperfect subjunctive is "fer-." The second person plural ending for this form would then be "retis," which gives us "ferrētis."

In this context, "ferrētis" corresponds correctly to the form of "fertis" when changed to the imperfect subjunctive in the second person plural. This makes it the right answer, as it accurately reflects both the tense and the mood specified in the question.

Other options do not fit the criteria of an imperfect subjunctive form of "fertis" and do not reflect the proper transformation needed.