C. both a and b! :)
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Answer: One of the reason was due to entry of ships, the canal locks would raise ships on one side of the isthmus, the ships would cross the lack and be lowered to sea by locks on the opposite side
Explanation:
The building of the Panama canal was an act of justifiable imperialism. The United States government realized the government of Panama wanted to build the canal for themselves and dictate to the Americans, so they hindered them. One of the reason was due to entry of ships, the canal locks would raise ships on one side of the isthmus, the ships would cross the lack and be lowered to sea by locks on the opposite side.
This helped in linking the Atlantic and Pacific Oceans and providing a new route for international trade and military transport.
5 years you have to redo it every 5 years I think
Because the environment cannot support a large population of people as large as the population in china currently
