Final answer:
A positive pregnancy test is the finding that would enable the nurse to tell the client that she is positively pregnant from the options provided.
Step-by-step explanation:
Out of the provided options, the finding that would enable the nurse to tell the client that she is positively pregnant is a positive pregnancy test. A positive pregnancy test is a reliable indicator of pregnancy as it detects the presence of the hormone human chorionic gonadotropin (hCG), which is only produced during pregnancy. Fetal heart rate via Doppler, positive Chadwick's sign, and Montgomery gland enlargements are also common findings in pregnancy, but they do not definitively confirm pregnancy like a positive pregnancy test.
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