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 study vocabulary words [title] Choose paper or electronic flash cards. [step] Paper flash cards are easy to carry around, and writing by hand may help you memorize the words more than typing. On the other hand, you can't lose a phone app or online tool. <sep> (A) If you've got a lot of time on your hands at work, buying flash cards can help you study faster and learn more vocabulary words. [substeps] If you are going through a difficult time, it is often useful to bring your wallet so you can take care of your wallet. (B) If you've never used a flash card before, an online flash card can take you far from what you need to remember. [substeps] Tablets, smartphones, and laptops can also be useful. (C) Some flash card software even lets you speak the words aloud, then writes the cards for you. [substeps] If using paper cards, try to find something small that you can carry in your pocket. (D) Another option is to stick with the electronic flash cards, which are durable and easy to carry around. Turn them into fancy writing cards, or use construction paper.
A:
C