Which us 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? "
a.) william mckinley
b.) theodore roosevelt
c.) woodrow wilson
d.) william howard taft

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.

this is a good question! i'll do some research and come back when i have the answer!