While the nurse is obtaining a health history, the client reports experiencing shortness of breath at times. The nurse determines that the client's respirations are regular and deep and respiratory rate is 14 breaths/minute. Which is the best nursing action?

Explain to the client the possible causes of dyspnea or "shortness of breath."

Ask the client to describe the episodes of dyspnea in more detail.

Document "dyspnea on exertion" in the client's medical record.

Ask the client to perform light exercise and observe the respiratory effort.