Definition: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Input: [header] How to travel during the holidays for seniors [title] Choose the right time of day for travel. [step] If you're older, you may not be able to stay awake for late nights or get up very early in the morning. Choose travel times that work for your energy level to assure a safe trip. <sep> (A) [substeps] Mid-morning or afternoon departure times may work best if you're a senior. If you're driving yourself, plan to drive around this time of day. (B) [substeps] Try planning your travel time between january and april at an average time for most seniors. This applies to senior seniors when these times are quite busy. (C) [substeps] You may opt to go on longer trips if you have patients with you, or if you are in an emergency situation. You may also choose to go on shorter trips if you have other patients with you. (D) [title] Seek the right electrolyte to keep you awake. [step] Most senior people need no more than 100 milligrams of caffeine or something in their morning cup (for example, coffee or tea).
Output:
A