Well i would start with this:
Causes are what makes the historical events happen
Effects are the outcome of the causes because they took place
"If I were you" is an example of D) passive voice and subjunctive mood.
Passive means you are not the one performing the action, and subjunctive mood is a wish which usually begins with if.
C. Introduces and opposing view, then refutes it logically and respectfully.
Ex-soldier is the best way to use hypen !!