Which statement regarding abnormal uterine bleeding (AUB) is most accurate?

A. Urinary frequency is a normal physiologic change of pregnancy. During the first trimester, increased levels of progesterone and estrogen cause increased renal blood flow and glomerular filtration, leading to increased urine production. In addition, the enlarging uterus sits low in the pelvis early in pregnancy, placing pressure on the bladder. Symptoms often improve during the second trimester when the uterus rises into the abdominal cavity. Urinary frequency typically returns in the third trimester as the fetal head descends into the pelvis and again compresses the bladder. This response accurately explains the expected pattern and provides reassurance.
B. The course of urinary frequency during pregnancy is well understood and follows a predictable pattern related to anatomic and hormonal changes. Telling the client there is no way to predict its duration is incorrect and does not provide helpful anticipatory guidance.
C. Although urinary tract infections are more common during pregnancy, urinary frequency alone is a common, expected finding in early pregnancy. A UTI would more likely present with additional symptoms such as dysuria, urgency, suprapubic pain, fever, or foul-smelling urine. This response is inappropriate because it assumes pathology without supporting evidence and may cause unnecessary anxiety.
D. Urinary frequency often improves after the first trimester, but it does not permanently resolve at 12 weeks. It commonly reappears in the third trimester due to increased uterine size and fetal descent. Therefore, this statement is incomplete and misleading

A. Magnetic resonance imaging (MRI) can provide detailed images of breast tissue and is useful for evaluating the extent of disease, but it cannot definitively diagnose breast cancer. It is typically used as a supplemental tool after an abnormal mammogram or ultrasound.

B. Ultrasound is helpful in distinguishing between solid and cystic masses and guiding biopsies, but it cannot confirm malignancy on its own.

C. Core needle biopsy is the definitive diagnostic test for breast cancer. It involves obtaining a tissue sample from the suspicious area, which is then examined histologically to confirm the presence of malignant cells. This step is necessary before treatment planning.

D. Mammogram is a screening tool that detects abnormalities such as masses or microcalcifications, but it cannot confirm cancer. Abnormal findings on a mammogram require further diagnostic testing, such as a biopsy, for confirmation.