london was the biggest city in the world in ______ A 1798 B 1891 C 1980 D 2000

Lodon is the capital of Britain.From about 1800 to the World War II(第二次世界大战),London was the biggest city in the world.But now there are many cities much bigger than London.
Travellers from all over the world visit the Thames(泰晤士河) and the famous clock,Big Ben.For me,I like the parks best.But my children’s favourite place is Hamleys,the biggest toy shop in the world.
Like many big cities,London has problems with its traffic and environment.More than 1,000,000 people use the underground in London every day,but there are still too many cars in the streets.The air is not dirty but not clean.At least it’s better than it was 100 years ago.
根据短文内容,选择正确的答案：
(B ) 1.London was the biggest city in the world in ______.
A.1789 B.1891 C.1980 D.2000
伦敦是英国的首都,大约从1800年到第二次世界大战（1945结束）期间,伦敦是世界上最大的城市.即（在1800到1945年之间,1891符合选项）