The answer will vary. If you're in elementary, then after 4-6 sentences. Middle school, you would write 6-8 sentences. If you're in high school, then 8-15 sentences would be appropriate to begin a new paragraph. Teachers always appreciate more work. Hope I helped :). <span />
Answer:
c. the actions of the colonists are foolish and ineffective
Explanation:
The colonialist of the excerpt were trying to find a solution to a problem that did not exist, therefore needed no solving. The rock wasn't in the way of the railroad, still, they were unsuccessfully trying to blow it. It does sound like a silly behavior.
Ethos, because it shows credibility of her being a teacher for a long time, which would make her a trustworthy source.