The answer is (B) The most crucial safety tip a rider must always follow is wearing a properly fitted helmet.
(A) Informs you on the price of horses
(C) Gives you a definition of what horse reins are.
(D) Describes what a horse looks like.
In this sentence convention would mean a way in which something is usually done
Uh it’s a bit messy- and everything is a basic color-
I think it would be the first one, although I am not positive.
