Pls help me

If one writes logically, he will prove his point. is this sentence correct or contains an unwarranted shift in person?

It was this unfathomable longing of the soul to vex itself- to offer violence to its own nature -- to do wrong forthe wrong's sake only - that urged me to continue andfinally to consummate the injury i had inflicted upon theunoffending brute.which theme does this sentence best support? ) a. humans are to struggle against their fate.b. all people have a wicked side.c. humans are meant to rule earth.od. no wrong will go unpunished.submit

Do not use this medicine with milk, cheese, or other dairy products. what end punctuation needs to be added to the above bolded word?