Final answer:
Giving a bull a brucella vaccine would result in an improved immune response to protect against brucellosis. This vaccine is designed to stimulate the immune system and does not affect fertility, sterility, or muscle growth.
Step-by-step explanation:
If you gave a bull a brucella vaccine, the expected outcome would be c. Improved immune response. Vaccines are designed to protect against specific diseases by stimulating an animal's immune system to produce a defensive reaction. In the case of the brucella vaccine, it is used to prevent brucellosis, a bacterial infection that can affect various organs and reproductive systems in bulls.
It is important to note that vaccinations do not lead to increased fertility, sterility, or enhanced muscle growth. These outcomes are generally influenced by other factors such as genetics, management, and overall health. The brucella vaccine specifically aims to prevent infection, which could indirectly contribute to overall health and potentially affect fertility, but its primary function is to boost immunity to brucellosis.