What we can learn from the video？A.We can easily change our life within 30 days if we u

What we can learn from the video？

A.We can easily change our life within 30 days if we use his method.

B.Without the 30 days challenges, we will never remember how days have passed.

C.We should start hiking or riding bike for next 30 days.

D.We should try something we always want to try for next 30 days in order to make life more meaningful.