Why are some brands more popular than others ______ the products are of similar quality?

Why are some brands more popular than others ______ the products are of similar quality?
A. as though B. even if C. so that D. in case
【答案】B
【解析】
【详解】考查让步状语从句。句意：为什么即使产品很相似，一些品牌却比其他的更流行呢？A. as though好像；B. even if 即使，虽然；C. so that因此；D. in case 以防，万一。故B选项正确。