Which of the following statements is true of three-dimensional printing (3DP)?

a. It will eliminate the need for transportation of finished goods to distribution centers and retailers.

b. It cannot be used in industries such as auto parts, biomedical, and fast food.

c. It is expected to have a negative impact on businesses' carbon footprints and the environment at large.

d. It will lead to mass production of standardized goods than custom products.