Elif: I think we should recycle more.
Can: You are right. What about starting a recycling campaign at school?
Elif: Great idea! We can collect paper, plastic, and glass.
Can: We must also inform our friends about the importance of recycling.
According to the conversation above, what is the main idea?
A)Starting a recycling campaign at school
B)Collecting only paper and plastic
C)Buying new recycling bins
D)Talking to teachers about recycling