A nurse is assessing a client who is at 11 weeks of gestation and reports drinking ginger tea. Which of the following findings indicates the client's use of ginger tea is effective?

A is correct because ginger tea is an herbal remedy that has been shown to reduce nausea and vomiting in pregnancy. B is incorrect because ginger tea does not have any effect on breast tenderness, which is a common symptom of pregnancy caused by hormonal changes. C is incorrect because ginger tea does not have any effect on headaches, which can be caused by various factors such as dehydration, stress, or caffeine withdrawal in pregnancy. D is incorrect because ginger tea does not have any effect on urinary frequency, which is a common symptom of pregnancy caused by increased blood volume and pressure on the bladder.