How should “yaḥmilu al-wathāʾiqa” be analyzed after “dakhala al-bāḥithu”?

Supplementary Practice 10: Rhetoric of Claim, Evidence, Objection and Reply

• An affirmative imperfect circumstantial clause linked by an implicit pronoun
• Two complete independent sentences coordinated by wāw
• An adjective of the necessarily indefinite noun al-bāḥith
• The apodosis of a past-tense condition