HURRY BRAINLIEST!
What is probably affecting the cattle that Monty handles in the following scenario?

Monty is a handler on a dairy farm. He has noticed that during the late summer months, many of the cattle become raggedy and irritated. Milk
production dwindles, and they seem especially jumpy.

A. Nematodes
B. Lice
C. Flukes
D. Grubs