PLEASEEE HE

What was the main motivation for the U. S. to become involved in the completion of the Panama Canal?

The main impact of the completion of the Panama Canal was that it increased world trade, since it allowed shipping to take place between the Atlantic and Pacific oceans with unprecedented ease.

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's.