Question

1. about 5 to 10 percent of malignant breast cancer cases are the result of what?

benign fibroids
exposure to tobacco products
genetic predisposition
exposure to x - rays

Explanation:

Benign fibroids are non - cancerous. Exposure to tobacco products is more linked to lung cancer etc. Exposure to X - rays in moderation is not a major cause for 5 - 10% of breast cancer. Genetic predisposition (e.g., mutations in BRCA1 and BRCA2 genes) is known to account for about 5 - 10% of malignant breast cancer cases.

Answer:

genetic predisposition