Answer:
B. whinnied, their hooves clopping
Explanation:
A. NO CHANGE
First of all, horses don't shriek.
Secondly, horse hooves don't clang.
A is incorrect.
B. whinnied, their hooves clopping
[ˈ(h)winē]
VERB
(of a horse) make a gentle, high-pitched neigh.
"the pony whinnied and tossed his head happily" -Lexico
clop
[kläp]
NOUN
a sound or series of sounds made by a horse's hooves on a hard surface.
"the plodding clop of patient draft horses" -Lexico
Horses do whinny and their hooves do clop.
B is correct.
C. brayed, their hooves whooshing
"A horse doesn't bray, but a zebra does." -petsonmom.com
Horse hooves don't whoosh either.
C is incorrect.