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 contact fedex [title] Find the appropriate number. [step] Fedex has different numbers depending on what you need, though there is one main customer support number. You can find a full list of numbers on the fedex website, including the one appropriate for your problem or need. <sep> (A) [substeps] The main customer support number for the u.s. and international calls for fedex office is 1-800-go-fedex or 1-800-463-3339. (B) [substeps] If you are trying to initiate a fedex call on a mobile phone, you will usually dial this number. If you call on a pc or mac, you can use a different number. (C) [title] Approach fedex representatives with a request for professional assistance. [step] Fedex is open monday through friday, but may also be open later for an email or a call. (D) If you are in a relationship, you may need to contact fedex customer support by phone, email, or through mail. [substeps] In the united states, fedex is run by the federal trade commission (ftc).
A