Cows with _____ have a higher incidence of mastitis because a

Cows with _____ have a higher incidence of mastitis because a physical injury is more likely.

A. Sickled hocks

B. Horns

C. Lower foot angles

D. Pendulous udders

I have been asked this question in final exam.

My question is from Dairy Products topic in division Products of Dairy Engineering

Correct choice is D. Pendulous udders

To explain: Mastitis is a common cow disease due to infection in udders. Cows with pendulous udders are more prone to it.