After taking the vital signs of a client, the nurse notes the client has a high systolic blood pressure reading. Which factors should the nurse include when explaining the possible cause of this increase? Select all that apply.

A. Caffeine intake: Can cause a temporary increase in blood pressure due to its stimulant effects. B. Post meal: While eating can cause temporary changes in blood pressure, it is less likely to be a significant factor compared to other causes. C. Stress: Can lead to temporary increases in blood pressure due to the body's stress response. D. Drinking a glass of water: Typically does not significantly affect blood pressure unless there is an underlying issue such as dehydration. E. Time of day: Blood pressure can naturally vary throughout the day, often being higher in the morning and lower in the evening.