The underlined word" switching" in Paragraph 5 probably means ______.

A．McDonald's is a pioneer in food products
B．McDonald's is enlarging its restaurants in the world
C．fried foods can't keep up with the development of moden society
D．McDonald's is to use new cooking oil

A．He was the first man to start the Olympic Games.
B．He helped start the modern Olympic Games.
C．He believed that sports were less important than studies.
D．He failed to begin the modern Olympic Games.