The correct answer is C) Comitting large amounts of American troops to the fight and massive bombing.
Lyndon B. Johnson comitted thousands of troops to Vietnam after the Tet Offensive of 1968. This attack by the Vietcong against the US and South Vietnamese forces was a devastating loss. In order to recover from this loss and increase the chances of American success in stopping the spread of communism to South Vietnam, Johnson comitted more troops for reinforcements.
Calvin Coolidge, the 30th president of United States, meant that the government should be business friendly, in context to his famous quote where he said "the chief of business of the American people is business".
According to him, the Americans were very concerned about the economy and their personal prosperity and was inclined to praise the major business leaders and the business community, giving them the credit for the economic prosperity of the country.
But if we read on the complete quote, we can conclude that he did not only emphasize on business or wealth accumulation alone rather talked about peace and honor as the core values of America.
Since the French and Indians were fighting against the British in North America, it became known as the French and Indian War. In fact, Indians also fought on the side of the British