Amylase is an enzyme that catalyzes the hydrolysis of starch into sugars.Lactase enzyme is found in the small intestine of mammals that catalyzes the breakdown of lactose (milk sugar) into the simple sugars glucose and galactose.Maltase, an enzyme that catalyzes the hydrolysis of the disaccharide maltose to the simple sugar glucose.For foods that include sucrose, invertase splits the sugar into its parts of glucose and fructose.So, the correct answer is 'A=amylase, B=lactase, C=maltase, D=invertase".