posted by Jim .
What 1968 event caused U.S. military leaders to be concerned that a quick end to the war was not possible?
A.) The Students for a Democratic Society was founded.
B.) Eugene McCarthy made a strong showing in the New Hampshire primary.
C.) President Johnson announced that he would not run for another term as president.
*D.) The U.S. military suffered a major strategic blow in the Tet Offensive.