For the Graphical Equivalence Point Determination for a Precipitation Reaction,which

For the graphical equivalence point determination for a precipitation reaction,which of the following is(are) TRUE?
I The steepest slope of the titration curve is the equivalence point.
II The equivalence point occurs where the first derivative of the titration curve reaches its largest value.
III The equivalence point occurs where the second derivative of the titration curve equals zero.

A) I only
B) II and III
C) II only
D) III only
E) I,II,and III

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