How was the following 1965 exchange between a Johnson aid and Lyndon Johnson—who

How was the following 1965 exchange between a Johnson aid and Lyndon Johnson—who was both escalating the war in Vietnam and a close watcher of the polls—illustrative of the volatility of public opinion: The aid told Johnson: “we have overwhelming public opinion on our side.” Johnson replied, “Yes, but for a very underwhelming period of time.”

A) Two-thirds support for the war in 1965 turned into two-thirds opposition in 1968
B) Two-thirds opposition for the war in 1965 turned into two-thirds support in 1968
C) Two-thirds support for the war in 1965 remained two-thirds support in 1968
D) Two-thirds opposition for the war in 1965 remained two-thirds opposition in 1968

This is for my political science class.