micah promises to pay gretl, his niece, $8,000 if she finishes her college degree at flagstaff college, where she is in her third year. gretl finishes her degree. micah must pay because a. gretl obtained a degree at flagstaff college. b. obtaining a degree benefits gretl. c. gretl was enrolled at flagtaff college when the promise was made. d. a job can be hard to find after college.