Which of the Following Statements Is(are) True About $\alpha$ -Amino Acids?
A) the Amino and Carboxylic Acid Groups Are

Which of the following statements is(are) true about $\alpha$ -amino acids?

A) the amino and carboxylic acid groups are separated by one carbon atom
B) the amino group is connected to a carbon atom that is $\alpha$ to the carboxylic acid group
C) the $\alpha$ carbon can be a chirality center
D) all of these