Final answer:
The correct answer is b) Hours, as Jonathan Edwards is known to have studied for at least thirteen hours each day, demonstrating his dedication and discipline to his theological and philosophical pursuits.
Step-by-step explanation:
Jonathan Edwards, a significant figure in American history known for his role in the Great Awakening, was renowned for his discipline and dedication to study. It is documented that he devoted a significant amount of time to his studies, which included theological examination, sermon preparation, and philosophical contemplation.
When considering options a) minutes, b) hours, c) days, and d) weeks, it would not be feasible for someone to study for at least thirteen days or weeks each day due to the constraints of time in a daily cycle. Thus, the most reasonable measure considering the effort he put into his work is in terms of hours. Edwards studied for at least thirteen hours each day, as this amount of time is feasible within a day and reflects his intense commitment to his work and studies.