一道英语阅读题目which of the following statements is NOT TRUE?

一道英语阅读题目which of the following statements is NOT TRUE?
which of the following statements is NOT TRUE?
A.the first few modern olympic games sometimes lasted for months.
B.the marathon was an ancient olympic event.
C.fourteen countries participated in the first modern olympic games.
D.the olympic flag was a white one with five colored rings:blue,black,red,yellow and green.