Multi-select problem: How does the next paragraph end?

How to start mountain biking
Get an appropriately-sized mountain bike.
Your bike should match your height, body type, and the length of your leg. If a bike doesn't fit you well, then it will be uncomfortable and inefficient to ride.

Pick your answer from:
[I] Bike shops sell perfectly sized mountain bikes, so choose bike that is comfortable but still aesthetically pleasing. Additionally, look around for a bike with good brakes and nice height.
[II] As you bike, you could also stand on the bicycle and work on your legs. This will help prevent injury on your thighs, hips, and tailbone.
[III] A good bike shop will be able to set you up with a bike specific to your needs. Many will offer repair, service plans or discounts on future purchases.
[IV] It is recommended that you have an appropriate weight of at least 70 pounds. If your bike cannot handle around 100 pounds, consider purchasing a bike that can support that number.
[III]