It was "Philippe Bunau-Varilla" who <span>was the engineer in charge of building the canal through Panama for the French, although he had help from other engineers as well. </span>
B I believe because the senate voted if the president is impeached or not.
Spain, Portugal, England and France all wanted to establish territories in the Western Hemisphere. The reasons were to gain more territory and to take advantage of all the raw resources found in the New World, Especially gold and silver along with timber and other resources. It was for a Competition of the Empires so that they'd become the most powerful in the world.