How did the physical environment of panama affect the building of the canal?

a) underground oil reserves made digging the canal difficult
b) cold, wet weather allowed diseases to spread quickly.
c) regular floods made canal access easier for engineers.
d) rugged mountain terrain made construction more challenging.

The answer to this is B) Cold, wet weather allowed diseases to spread quickly.

B) Cold, wet weather allowed diseases to spread quickly.

Explanation:

At the beginning of the 20th century, the construction of the Panama Canal was paralyzed. What currently appears on a sea route that on the coasts of the Atlantic Ocean and the Pacific, previously, in a breeding ground for diseases, in particular, yellow fever. Yellow fever, or Siam's disease, is a vector-borne viral disease that causes high fever, vomiting and severe pain. If you do not receive treatment, the disease progresses and wreaks havoc on the liver, which causes the disease, severe abdominal pain, internal bleeding and, ultimately, death. This disease claimed the lives of thousands of workers during the construction of the Panama Canal. If they had not been launched in research focused on the eradication of this disease, more workers would have died and this key trade route has not been established.

b) a state law could be declared illegal if it contradicted the constitution.

explanation:

the conflict of this case originated when james w. mcculloch, a cashier of the baltimore branch of the second bank of the united states that the congress had chartered in 1816, refused to pay a tax imposed by the maryland state.

in the case, the state of maryland appealed that the establishment of a second bank was unconstitutional since the constitution didn't say anything about granting that power to congress. however, the case determined that even if such right wasn't specifically stated in the constitution, it was part of the "implied powers" of the government enunciated in article i, section 8.

the case also eliminated maryland's legislation to impose taxes to a national bank, asserting that even though the states retained the power of taxation, the constitution's laws are supreme and can not be controlled by the states, therefore, if a state law contradicts the constitution, it should be declared illegal.

explanation:

answer: the risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

explanation: