Rover Motor Test

Hoping to get some help here trying to set up my Rover and I have a couple of question

Question 1

when I do my motor test
Throttle 20% to see some movement

Test Motor A- Nothing Happens

Test Motor B- Nothing Happens

Test Motor C- Turns Left

Test Motor D- Moves Forward

Question 2

How do I set up for me to be able to have R/C to take make drive of the Rover (like Manual Mode)

Any help will be highly appreciated

Do I have to do anything to the frame type ?