Questions 17-20 are based on the following passage. You now have 15 seconds to read Questions 17-20.

What does the Olympic Symbol of 5 linked rings represent

A．Voters must be Americans.
B．Voters can get registered in any state at any time before the Election Day.
C．Local election officials decide what kind of voting equipment is used.
D．Paper-and-pencil ballots are rarely used these days.