Which U. S. president wrote the following in his autobiography, "By far the most important action I took in foreign affairs during the time I was President was related to the Panama Canal?"

B.Theodore Roosevelt

Explanation:

Theodore Roosevelt was American politician who served as 26th president of the US. He stayed in office from 1901 to 1909. He also worked as 25th vice president of USA.  He is considered to be among five best presidents. Construction of [panama canal was completed during his presidency, he used Big Stick Diplomacy  and brokered to get agreement for constructing Panama canal. He also expanded US influence in Cuba and negotiated the peace treaty between Russia and Japan.

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof

honeslty bro its the same thing