The following question is based on the following equation, which refers to a closed economy with no government:

C = 100 + 0.75Y

Which of the following statements is/are correct?

a. When income is zero, private savings are 100.
b. The slope of the savings function is 0.75.
c. The savings function will be given by S = 100 + 0.25Y.
d. None of the statements is correct.