I think its either C or D but am unsure Any help Which of th

I think its either C or D but am unsure. Any help?

Which of the following describes how the instantaneous reaction rate changes over time during the formation of O₂ from the decomposition of N₂O₅?

A. The rate increases to infinity as reaction time increases.
	B. The rate decreases to zero as reaction time increases.
	C. The rate remains stable as reaction time increases.
	D.The rate increases and then decreases as reaction time increases.

B. The rate decreases to zero as reaction time increases.