The pH titration curve of an aqueous solution of a simple aliphatic amino acid with general formula $$\text{NH}_2\text{-CHR-COOH}$$, where R is an alkyl group, against NaOH is represented below. Identify the correct statements pertaining to it.

A

In aqueous solution, amino acid mainly exists as $$^+\text{NH}_3\text{-CHR-COOH}$$

B

At point A, $$[^+\text{NH}_3\text{-CHR-COOH}] = [^+\text{NH}_3\text{-CHR-COO}^-]$$

C

At point B amino acid exists in zwitter ion form.

D

At point C, $$[\text{NH}_2\text{-CHR-COO}^-] = [^+\text{NH}_3\text{-CHR-COO}^-]$$