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".
Q: [header] How to help develop your baby's eyesight [title] Turn on a light in baby's room. [step] In the first four months, a baby can only focus on an area between 8 and 12 inches from their face. Your baby will respond to movement in the first week. <sep> (A) However, play with your baby just to make sure they are not less focused and developing eyesight. [title] Teach your baby how to hold objects. (B) However, they will get eyesight acclimated to the light within a few hours. [substeps] The illumination from candles or incandescent lightbulbs is great to diffuse and bounce light from. (C) For the first week of toddler development, try to keep the lights off around the room at all times. [substeps] You don't have to turn them on if it bothers you or scares you. (D) Exposing your baby to light during the day and small amounts at night cannot only soothe them, but also help develop their ability to focus on you and other movements. [substeps] Use a nightlight or another dim lamp in your baby's room.
A:
D