Which of the following individuals is practicing intertemporal substitution?
select one:
a. malika decides to stop being a stay-at-home mother and enters the workforce because the economy is booming.
b. anneliese studies continuously throughout the semester for her final exams.
c. the united states enters a recession, and tashika loses her job.
d. sharona decides to stop being a stay-at-home mother and enters the workforce to get extra money for future college expenses.