The answer C correctly uses possessive form and is the right answer. It's not A because there is only one George so the apostrophe is in the wrong place. In B, there's not even an apostrophe and it's not clear as to whether there is only one cousin or two or more cousins. In answer D, here should not be an apostrophe for develops.
Answer:
to occur unexpectedly and have destructive or harmful effects
Explanation:
1. D. Argumentation
Argumentative essays is a genre of writing where a certain topic is discussed, explored and inspected. It often makes use of empirical research. The writer then chooses a side on the topic, explaining his opinion on the matter in a compelling, evidence-based essay. It usually uses first person to make the writer's ideas and stand on the issue clear and concise.
2. B. Credible
Sources are the basis for informed opinion. Thus, it must be credible.
Options two refers to the author being a teenager himself so he would be reliable for this info because it is firsthand.