Final answer:
The statement indicating that further evaluation is needed for a child post-chemotherapy is experiencing ringing in the ears, known as tinnitus, which could signal ototoxicity from the treatment. Correct option is B.
Step-by-step explanation:
In assessing a child who underwent chemotherapy, the statement by the client that indicates further evaluation is needed is "My ears are ringing". This symptom, known as tinnitus, can be an indication of ototoxicity, which is a common side effect of certain chemotherapy agents. Ototoxicity can result in hearing loss or damage if not addressed. Tinnitus may also suggest other underlying conditions that warrant medical attention. The other statements A, C, and D may be considered more typical or less immediately concerning post-chemotherapy effects, such as expected fatigue or maintaining normal activities like playing. However, persistent or severe appetite changes or extreme fatigue should also be evaluated.