Which action indicates Adam understands how to manage his stable angina before a walk?

Managing stable angina effectively involves having access to appropriate medication that can alleviate potential symptoms during physical activity. In this context, putting antianginal medication in his pocket indicates that Adam is aware of the need to be prepared should he experience angina symptoms while walking. This proactive approach demonstrates a clear understanding of his condition and the importance of having medication readily available to manage any discomfort.

While other actions such as bringing water, wearing a heart rate monitor, or walking with a friend can support overall health and safety during exercise, they do not directly address the immediate management of angina symptoms. Having the antianginal medication on hand is specifically tailored to his condition and signifies an understanding of how to mitigate the risks associated with stable angina during physical exertion.