Who invaded and conquered Britain for the first time in 55 BC?

Who invaded and conquered Britain for the first time in 55 BC?
A、Emper or Claudius
B、Julius Caesar
C、King Alfred
D、King Ethelred
【正确答案】：B
【题目解析】：公元前55年凯撒大帝第一次入侵并征服了英国。