Answer:
a. "Unable to defeat our enemy or break his will – at least without a huge, long and ever more costly effort – we must actively seek a peaceful settlement."
Explanation:
Lyndon B. Johnson’s 1965 speech about Vietnam comprises of options b, c and d.
One success this plan of government had was in how it dealt with the organization and the sale of western lands.
Iroquois was the civilization that formed a confederation that may have impacted the US government
Couldn’t find a direct answer, but D seems the most logical to me.
Hope this helps.