The answer involves "Casual"

Whenever an argument explains or offers a reason why something occurs, that argument is asserting that a cause-and-effect relationship exists. In this argument, the author explains that jogging is the reason why people are getting these injuries.

I think you did what I did by reading it as CASUAL, not CAUSAL.

Make sure you read carefully. If you read too quickly, you can confuse words with one another that have the same letters in them. Check out this study for reference: Aoccdrnig to a rscheearch at Cmabrigde Uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoetnt tihng is taht the frist and lsat ltteer be at the rghit pclae. The rset can be a toatl mses and you can sitll raed it wouthit porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe. You can read that pretty easily. When taking the LSAT, make sure you are absorbing each word, and you won't do this with other words.