Lactase is an enzyme that is produced in the lining of the intestines. This enzyme helps the body speed up the breakdown of carbohydrates that are found in dairy products, such as milk, yogurt, and cheese.
Which general function does lactase perform?

Fighting disease
Creating movement
Regulating cell processes
Sending chemical messages

Lactase’s function is to break down lactose into the two simple sugars it is made up of, glucose and galactose.

Explanation:

Breaking down lactose into its simple sugars makes it possible for it to be absorbed through the small intestine and used by the body.

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1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

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explanation: