Answer:
B. Studying mathematics
Step-by-step explanation:
Francis Bacon was an english phillosopher and polititian that served as Lord Cancellor and attorney general in britain his work are believed to have helped develop the scientific method and wrote several advices for people, among which you can encounter:
"If a man's wit be wandering, let him study the mathematics."
You can find this and more advices in "Of Studies" which is an essay by Francis Bacon that describes several was to approach studying and culture.