Why does working out make us feel good?
O
A. It releases chemicals called endorphins into our bodies.
O
B. It increases our energy levels.
O
C. It gives us a more positive body image.
O
D. All of the above.

D, all of the above

Explanation:

Exercising releases endorphins, endorphins make you happy. Happy people don't shoot their husbands

          -Elle Woods

But yeah all the others are true. Hope this helps :)

when comparing the cases, what similarities are there in the cases that suggest one person committed these murders?