Answer: It is the Panama canal
Explanation:
<span>Assuming that this is referring to the same list of options that was posted before with this question, <span>the correct response would be that violations of the Sherman Antitrust Act were rarely prosecuted, since it was often hard to the prosecutors to prove there was any wrong-doing. </span></span>
Extreme conditions made it hard to establish routes connecting various region.
I think it’s c. i mean im 95% sure