The correct answer is A. Joseph Walker was the man that encouraged Americans to move to California with stories of its rich soil, warm sun and friendly people.
Joseph R. Walker was a mountain man, fur trader and experienced American explorer remembered for having participated in the Bonneville expedition and having found the Walker pass, which in the future would be the access route to California.
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The correct answer is D) Joseph McCarthy.
McCarthy was a Senator from the state of Wisconsin during the 1950's. At this time, McCarthy claimed to have a list of 207 names of individuals within the US government that were communists. This accusation was seen as an immediate threat to American society, as the US was trying to stop the spread of communism on a global scale. The accusations raised fear and suspicion throughout American society. This era is now known as the second Red Scare.