B. Fill in the blanks:
1. Deficiency diseases can be prevented by eating what

They can be prevented by eating healthy food or a daily vitamin supplement to help prevent it.

Explanation:

Stopping behaviors that contribute to the deficiency, such as unhealthy eating, smoking, and heavy alcohol use, can help prevent vitamin deficiency anemia. Eating a healthy diet can lower your risk of developing the condition. Some people take a daily vitamin supplement to help prevent the condition.

I would like to say that I did not copy from the previous answer but that I just googled deficency deises and used their explenation to help with my answer and that i didn't see their answer until after I had posted mine.

"d.) carbon dioxide and hydrogen sulfide"

a and c are the answeres