Assuming which the passage from the problem is with regard to the thinking of someone who is faced with selecting a study course of motion to choose, not assessing the result of an action currently taken, I would use best being an adjective. For a more complete explanation of why https://criminallawyerindhakarach82436.blog-kids.com/38533175/criminal-lawyer-in-dha-karachi-pakistan-for-dummies 
