题目内容：
阅读下列短文,回答题.Can you imagine life without French fries(炸薯条) ? Potatoes are very popular today.But inthe past this was not true.Potatoes grew in south America five thousand years' ago.But they onlybecame popular in other places two hundred years ago.
In the 1500s, the spanish took the potato from south America to Europe.But the people inEurope did not like this strange vegetable.some people thought that if you ate potatoes your skinwould look like the skin of a potato.Other people could not believe that you ate the undergroundpart of the plant.so they ate the leaves instead.This made them sick because there is poison (毒性) in the leaves.
In the 1800s, people in other parts of the world started to eat potatoes.In Ireland, potatoes became the main food.Then, in 1845, a disease killed all the potatoes in Ireland.Two million people died of hunger.
Today, each country has its own potato dish.The German people eat potato salad, and theUnited States has the baked potato.And, of course, the French invented French fries, which arenow popular all over the world.
When did potatoes get well-known outside south America? A．About 200 years ago.
B．About 300 years ago.
C．About 400 years ago.
D．About 500 years ago.
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