Answer:
A) Vitamin A
Explanation:
Dark green vegetables are a good source of Vitamin A, and do not contain much, if any, Vitamin D, zinc, or selenium.
Answer: none of those listed
Antitoxin can be derived from either human (e.g., tetanus immune globulin) or animal (usually equine) sources (e.g., diphtheria and botulism antitoxin). Antitoxins are used to confer passive immunity and for treatment.
drinking lots of water
c. living in a low ses household