Answer Happy

I do not understand why this answer is incorrect. Can youexplain to me why there would be three equivalence points seeing asthe two amines are both primary, and therefore should both beneutralized at the same time?
Question 1 A biochemistry student has an aqueous solution of the amino acid shown below. NH₂ H₂N OH Upon performing a titration of this solution with NaOH, how many equivalence points would be observed? O A. 0 Show Explanation OB. 1 Show Explanation XOC. 2 This answer choice is incorrect O D. 3 D is correct. In titrations of weak acids and weak bases, one equivalence point is found for each acidic or basic functional group. Because the amino acid shown in the picture has two amino groups and one carboxylic acid group, three equivalence points will be observed during its titration with NaOH.