Luna’s beautiful palomino tore a ligament while playing with other young foals in the field. The vet bandages up the leg and explains to Luna that it should be allowed to heal for a few days. He tells Luna that this does not mean her horse should not walk; in fact, he tells her that exercise is essential. To prevent the horse’s muscles from beginning to break down, how soon should Luna get him out carefully exercising?

A.
within the hour

B.
within a day

C.
within three days

D.
within a month