At a Routine Health Examination,a Woman Whose Mother Had Breast

At a routine health examination,a woman whose mother had breast cancer asks the nurse about the genetic basis of breast cancer and the genes involved.What should the nurse explain?

A) Her risk of inheriting BRCA gene mutations is small unless her mother had both ovarian and breast cancer.
B) Changes in BRCA genes that normally suppress cancer growth can be passed to offspring,increasing the risk for breast cancer.
C) Because her mother had breast cancer,she has inherited a 50% to 85% chance of developing breast cancer due to mutated genes.
D) BRCA1 and BRCA2 are genes that promote cancer growth,although only a small percentage of women with breast cancer have this genetic abnormality.