The daughter of a woman who has been diagnosed with ovarian cancer asks the nurse about screening for this cancer. Which response by the nurse would be most appropriate?

"There's a blood test for a marker, CA-125, that if elevated indicates cancer."

"Currently there is no reliable screening test for ovarian cancer.

"A Papanicolaou test is almost always helpful in identifying this type of cancer."

"A genetic test for two genes, if positive, will identify the ovarian cancer."