A Woman Attempting to Conceive Tells the Healthcare Professional That

A woman attempting to conceive tells the healthcare professional that she and her partner have intercourse when her basal body temperature (BBT) is around 37°C (98°F) without getting pregnant. What information does the professional give the woman?

A) Maybe you need a fertility workup.
B) That's a normal temperature, but during ovulation BBT decreases.
C) Temperature alone is not the most accurate way to predict ovulation.
D) BBT rises consistently above 37.8°C (100°F) with ovulation.