Correct Answer: C

Rationale: Ulcerations in the mouth, tongue, or throat are often the first signs of methotrexate toxicity and should be reported to the provider immediately.

Correct Answer: A

Rationale: To calculate the flow rate in mL/hr: (Volume in mL / Time in hours) = Flow rate in mL/hr. In this case, (100 mL / 0.5 hr) = 200 mL/hr. The correct calculation is: 100 mL (volume) / 0.5 hr (time) = 200 mL/hr.

Correct Answer: A

Rationale: Irinotecan is known to commonly cause diarrhea as an adverse effect due to its impact on the gastrointestinal tract. Therefore, the nurse should closely monitor the client for signs of diarrhea while receiving this treatment.

Correct Answer: D

Rationale: Enoxaparin is administered as a subcutaneous injection in the abdomen to prevent bleeding complications. Injecting into the muscle or massaging the site can increase the risk of bleeding. Rotating sites between the arms and thighs is not recommended for Enoxaparin administration due to variations in absorption rates.

Correct Answer: A

Rationale: The correct answer is A: Dyspnea. Dyspnea can indicate pulmonary toxicity, a severe adverse effect of trastuzumab. It is crucial for the client to report any breathing difficulties promptly to ensure timely intervention and prevent further complications.