The best answer would be the arguments between the government officials of the United States and Panama. The disagreements between the United States and Panama government leaders pretty much delayed the construction since the region was in a phase where they had a change in the way of leading.
D. Increased life expectancy
The answer is strongly dependent on WHAT trend you have in mind.
<span>Movements of tectonic plates create volcanoes along the plate boundaries, which erupt and form mountains.</span>
