![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
What's the main idea of Para. 3 ?
A.
The difficulties that some organizers meet this year.
B.
Some organizers this year are very happy.
C.
This year major networks will advertise Buy Nothing Day.
D.
Over one million people join in the Buy Nothing Day this year.