Please answer this correctly and i will upvote all your comments!
the theory is that because smarter people tend to work longer they may choose cats as pets more often.
what is the point of this sentence?
cat owners work longer because they are smarter.
cats tend to have owners that work long hours.
smart people choose pets that fit with their lifestyle.
smart people need to have certain pets.
(i chose a. but i have no idea)