James got lost in the city, _____ he had to ask for help.

James got lost in the city, _____ he had to ask for help.
A、or
B、so
C、but
D、for
【正确答案】：B
【题目解析】：此题考查等立连词的用法，so表示结果。句意是：“詹姆斯在城里迷路了，所以他不得不求助他人。”