B

in case of 万一---。in line with (="in" agreement with) 与......一致, 符合：His actions were not in line with his belief.本句中in line with...作表语。In line with history and social evolution socialism is inevitable.本句中in line with引导地短语作状语, 意为“按照”。For the sake of 为了......起见。At the sake of冒......的风险。