Final answer:
The surest way to determine that one is pregnant is through the enlargement of the uterus.
Step-by-step explanation:
The surest way to determine that one is pregnant is through d. enlargement of the uterus. When a woman is pregnant, her uterus grows in size to accommodate the developing fetus. This can be detected through physical examination by a healthcare provider. It is important to note that other symptoms such as a feeling of general unwelness with vomiting and frequency of micturition can also be signs of pregnancy, but they are not as definitive as the enlargement of the uterus.
Learn more about Pregnancy