Hi
I only know one of them which The Tragedy of Romeo and Juliet.
I hope that's help !
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By "equipment" here, I would assume that you are talking about gym equipment. While it is safe to try out a new equipment for as long as you practice caution and follow the instructions (a), it can probably damage your body in the end especially if you are following a weight program. If you are not careful, you might also damage the equipment and not just your body. So, in this case, I would say (c).
A photograph of someone with back drops and studio lights
What needs motivated the invention of the cash register? clerks from embezzling money, and the need for better sales accounting