An older homeless client visits the psychiatric clinic to obtain a prescription renewal for alprazolam. During the health assessment, the client reports experiencing of chest pain. Which action should the nurse take first?

A) While chest pain is a serious symptom that requires medical evaluation, obtaining the client's blood pressure should be the first step to assess their cardiovascular status and determine the urgency of further interventions. B) This is the first action the nurse should take to assess the client's cardiovascular status and determine the urgency of the chest pain. C) While medication history is important, assessing the client's blood pressure is more urgent in this situation to rule out potential cardiovascular issues. D) While substance abuse history may be relevant to the client's overall health, obtaining the client's blood pressure is the priority to assess the potential seriousness of the chest pain.