How Do I Licence A Trailer How Many Cars Can I Haul In A Trailer With F350 Dully With Class D Licence?

How many cars can I haul in a trailer with F350 dully with Class D licence? - how do i licence a trailer

I have a class D license and I need to know how many cars can be transported on a trailer and the weight in the State of Massachusetts, I think he can carry only 2 or 3 cars on a trailer is more one more license ( To make CDL). I could not answer from the local RMV. Please help. Thank you for your time.