42. “Sneakers were invented more than 100 years ago. They were called croquet sandals. They cost five times as much as othershoes, so only rich people wore them. Then a company began to make tennis oxfords. Most people could afford these. Theywere very popular. Soon special sneakers were made for other sports, such as running. Now we have all sorts of sneakers.”The passage mainly tells _______.
(A) who could buy croquet sandals
(B) when sneakers were invented
(C) what the difference is between sneakers and running shoes
(D) how sneakers have changed through the years