Ummal travels back in time to deposit $100 in a high-interest-bearing savings account. When she returns to the present, she is a billionaire.

Ummal travels back in time to deposit $100 in a high-interest-bearing savings account. When she returns to the present, she is a billionaire. We can expect Ummal to work ________ hours because of the ________ effect.

A. more; substitution

B. more; income

C. fewer; substitution

D. more; labor-leisure

E. fewer; income