Question

which is a primary risk factor for developing cancer?
active immune system
lack of iron in the diet
lack of calcium in the diet
workplace exposure

Explanation:

To determine the primary risk factor for developing cancer, we analyze each option:

• An active immune system helps fight diseases, including cancer, so it's not a risk factor.
• Lack of iron in the diet causes conditions like anemia, not directly cancer.
• Lack of calcium in the diet is related to bone health issues, not cancer.
• Workplace exposure to carcinogens (like certain chemicals, radiation) is a known primary risk factor for cancer.

Answer:

D. workplace exposure