The first one is 's . And the second one is just ' . Because ''our cousins'' definitely plural. So, we do not use ''s'' after the plurals for kind of these words.
"C by showing the emotional aspect of an issue and evoking pitty"
would be the best option since appealing to ethos regards appealing to
"ethics", and most people who would show pity would have a strong moral
compass.
Both are extremely successful in their respective fields.
