Answer:
D It is Important to study
His purpose in delivering the sermon is to warn his congregation in particular, and presumably, by extension, his nation as a whole, that they must repent of their sinful ways and turn to God for forgiveness before it is too late.
Cannot is formal, while can't in informal.
"Cannot" and "can not" are interchangeable, but when you are asking question for example:
"why can't I...", you can also say "why can I not..." (which is more formal), but you can't say "why cannot I..."
"Not that I lov'd Caesar less, but that I lov'd Rome more. Had you rather Caesar were living and die all slaves, than that Caesar were dead, to live all free men?"
D. I may be wrong, but that is what I remember in public speaking class
