Lyndon B. Johnson--the Gulf of Tonkin involved the attack of a US ship off the coast of Vietnam.
With the Gulf of Tonkin incident, Lyndon B Johnson was able to show Americans the threat Vietnam posed for the United States. This incident allowed Johnson to increase the number of troops in Vietnam and create an official war for the US. A draft was started after this incident and interest in Vietnam increased for the US.
D. expamd into surrounding areas by taking lands away from nobles
I don’t know what article you read (so i can’t answer the first 2 boxes) but I could help you on the hypothesis part.
the Japanese-Americans were incarcerated during World War 2 because people were scared of them. people were scared of them because of what happened at pearl harbor.
hope this helps.
(PS: there was also a temporary act (idk the name of it) that forced Japanese-Americans to leave to camps. hope this helps. (don’t put that in the hypothesis, but that information could help you later.)