Which of the following sentences is correct?
A、This next chapter has a lot of difficult information in it, you should start studying right away.
B、This next chapter has a lot of difficult information in it. You should start studying right away.
C、This next chapter has a lot of difficult information in it; you should start studying right away.
D、This next chapter has a lot of difficult information in it, so you should start studying right away.
E、None of them.