(A) A canal could decrease flooding and this would benefit the large US-owned plantations in the area.
(B) The railroad was expensive to maintain and by the turn of the century it needed extensive repairs.
(C) Traveling over land exposed people to mosquitoes that carried diseases such as yellow fever and malaria.
(D) ** It would reduce travel time and enable the United States to export goods cheaply and more effectively.
EXPLANATIONS BELOW
Concept note-1: -Q. Why did the United States seek to build a canal across the Isthmus of Panama despite having already built a railroad with the same route in the mid-1800s? A canal could decrease flooding and this would benefit the large US-owned plantations in the area.
Concept note-2: -The corollary stated that not only were the nations of the Western Hemisphere not open to colonization by European powers, but that the United States had the responsibility to preserve order and protect life and property in those countries.
Concept note-3: -Which of the following best explains why the building of the Panama Canal supported United States’ efforts to become a world power? By providing a shortcut between the Atlantic and Pacific Oceans, it opened up new trading opportunities.
Concept note-4: -Throughout the 1800s, American and British leaders and businessmen wanted to ship goods quickly and cheaply between the Atlantic and Pacific coasts.
Concept note-5: -Convinced that all of Latin America was vulnerable to European attack, President Roosevelt dusted off the Monroe Doctrine and added his own corollary. While the Monroe Doctrine blocked further expansion of Europe in the Western Hemisphere, the Roosevelt Corollary went one step further.