Detailed Instructions: 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".
Problem:[header] How to get tanned fast [title] Choose a base lotion or oil with a low spf. [step] To get tan quickly, you'll need to apply a lotion or oil with a low spf, but you still want to make sure you have some protection from the sun's powerful rays. Choose between rub-on lotions, aerosol sprays, and oil rubs and mists that all contain some spf. <sep> (A) [substeps] Ideally, choose an spf between four and 15 depending on the strength of your base tan. If you are already somewhat tan, you can go with a lower spf. (B) [substeps] Always apply sunscreen to all of your arms and legs when you're outdoors. Spf is more effective than some other spf-based lotion or oil. (C) Some, however, will penetrate the skin and loosen or soften the layers. [substeps] Be sure to pick your set of products carefully. (D) [substeps] Benzoyl peroxide has the same natural, creamy results but has a low spf. [title] Apply sunscreen with vitamin e oil.
Solution:
A