Final answer:
The use of ginger tea during pregnancy is effective if it leads to decreased episodes of heartburn, a common issue due to gastrointestinal changes. Increased nausea and vomiting, swelling, or elevated blood pressure do not represent the benefits of ginger tea in pregnancy.
Step-by-step explanation:
The student has asked which of the following findings indicates that the client's use of ginger tea is effective. Given that the client is at 11 weeks of gestation, when nausea and vomiting due to increased pregnancy-related hormones are common, the effectiveness of ginger tea is most likely demonstrated by a decrease in these symptoms. Therefore, the correct finding that indicates the client's use of ginger tea is effective would be "Decreased episodes of heartburn." Ginger is commonly used to alleviate gastrointestinal complaints such as nausea and heartburn. The other options provided, such as increased nausea and vomiting, swelling of the ankles and fingers, and elevated blood pressure, do not typically represent the efficacy of ginger tea.