Which of the Following Conclusions Concerning the Concentration-Time Plot Provided

Multiple Choice

Which of the following conclusions concerning the concentration-time plot provided below is/are correct?
1) The concentration of substance D is decreasing over time.
2) The instantaneous reaction rate at point A is less than the instantaneous reaction rate at point B.
3) Substance D is a product of the reaction.

A) 1 only
B) 2 only
C) 3 only
D) 1 and 3
E) 1,2,and 3