Final answer:
Aspartame is an ester, an amide, and contains an amine group.
Step-by-step explanation:
Aspartame is an artificial sweetener that has the formula C14H18N2O2. It is a methyl ester of a dipeptide of two amino acids: aspartate and phenylalanine. Therefore, from the given options, aspartame is a ester (option f), an amide (option c), and the dipeptide portion of aspartame contains an amine group (option e).