Q: 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".
[header] How to make your cell phone last longer [title] Try buying a durable cell phone cover that can provide your unit the kind of protection it needs. [step] Covers or cases come in different materials. You can find one made of hard plastic, metal, rubber, or silicon. <sep> (A) The more durable the cover the better the battery life of your phone. [title] Make sure you use carbon-based cases for your phones. (B) Effective phone covers also protect your cell from scratches, lightening, sun, and other hazards, so make sure your cover is 100% durable before attaching it to your phone. This means that the phone must be capable of surviving outside conditions (light rain, sun damage, etc. (C) Remember that some warranty companies offer certain finishes to the phone or cover that can help your unit last longer. [title] Try to use non-washable materials. (D) However, most mobile gadget users believe that cell phone leather cases are the best. While it is more expensive, leather is the perfect material to shield your unit from potential hazards like drops, bumps, and spillage.
A:
D