Which revision best corrects the underlined sentence?
scientists have studied the benefits of hobbies.
having a pastime reduces stress
scientists have studied the benefits of hobbies,
having a pastime reduces stress.
scientists have studied the benefits of hobbies, but
having a pastime reduces stress
scientists have studied the benefits of hobbies:
however, having a pastime reduces stress.

"Scientists have studied the benefits of hobbies. Having a pastime reduces stress."

just add on too that

explanation:

each year on march 8, international women’s day is celebrated around the globe. it’s an important opportunity to shine a spotlight on women’s involvement, contributions, and accomplishments on a range of issues from domestic violence to the role of women in the c-suite. the theme this year is “be bold for change”― a dictum that those who know me personally will acknowledge has pretty much been my mantra throughout my career on wall street, in media and most recently, in philanthropy.the empowerment of girls as leaders, who can be emboldened today to become even stronger leaders tomorrow, is an increasingly recognized imperative in our world, and it couldn’t be closer to my heart

in my opinion, ap calculus was the most difficult. i often struggled with it a lot. however, i have gotten a lot better.