参考答案：B

解析： 本题是说为了防备塞车，今天早晨我去上班比平时提前了。B项“in case of (状语，放在句末)以防，防备(状语，放在句首)”。如：Always keep a bucket of water handy in ease of fire. in the case of多用于对比，常含有“而……的情况却不同”之意，如：Poverty depresses most people. but in the case of my father it was otherwise. Mary failed to hand in her homework in time because she was ill. but it was different in the case of Jane—she was lazy. 符合题意。其他三项中，for the sake of“为了，为了……的利益；看在……的份上”；at the risk of“冒着……的危险”；in spite of“虽然，尽管，不管，不顾”，都与题意不符。