Final answer:
The client statement that indicates an understanding of the teaching is D) "I will likely need to use alternative positions for sexual intercourse."
Step-by-step explanation:
Based on the information provided, the correct answer is D) "I will likely need to use alternative positions for sexual intercourse." This statement indicates an understanding of the physiological changes that occur during pregnancy. As the pregnancy progresses, the growing fetus and enlarged uterus can affect the comfort and safety of certain sexual positions. It is important for the client to be aware of alternative positions that may be more comfortable and reduce any potential risks.