Why is Reagan's statement, "Mr.
Gorbachev, tear down this wall!" so
significant?

Explanation:

He characterized the speech as a way for Reagan to assuage his right-wing critics that he was still tough on communism, while also extending a renewed invitation to Gorbachev to work together to create "the vastly more relaxed climate in which the Soviets sat on their hands when the wall came down."

the answer is c.richard m. nixon

mass production/ assembly line production