Use the Following Information to Answer the Questions Below

Use the following information to answer the questions below.
You are investigating the differences between three organic compounds. They all have the same carbon skeleton but have differences in their functional groups.
-The third molecule displays both acidic and basic properties. It most likely has

A) at least one carboxyl group.
B) at least one amino group.
C) at least one hydroxyl group.
D) both an amino and a carboxyl group.
E) both an hydroxyl and a carboxyl group.