The best thing you can do to keep a positive relationship with your supervisor is

a. keep your opinions to your self

b. challenge your supervisor

c. socialize with your supervisor and coworker

d. be productive at work

I would say that the best thing you can do keep a positive relationship with your supervisor is to d. be productive at work - your supervisor likely has their own supervisor and will be stressed if they have to explain to their supervisor why the work isn't done: and this stress would likely make your relationship worse.