Reagan’s Strategic Defense Initiative: Group of answer choices made the United States invulnerable to attack. forced the Soviets to spend extensively to keep pace. was inspired by a science-fiction movie. involved the United States’ building even more powerful nuclear weapons. went into operation in outer space in 1984.

forced the Soviets to spend extensively to keep pace.

Explanation:

The Strategic Defense Initiative (SDI) refers to an anti-ballistic missile program intended to take down nuclear weapons in orbit, was launched by President Ronald Reagan during the 1980s.  Reagan's government put up an argument that the Soviet Union was well ahead of the US in developing a new form of offensive weapons that would be several times more powerful than the Hydrogen bomb. The logical next move was an anti-ballistic missile system that would give the US complete defense from the Soviet Union.

A). Forced the Soviets to spend extensively to keep pace.

Explanation:

The United States' 40th president Ronald Reagan proposed one of his massive and influential project 'Strategic Defense Initiative.' It was basically a missile defense system that aimed to safeguard the United States from any kind of underwater ballistic attack and nuclear attacks. It was so effective that 'it forced the Soviets to spend extensively to keep pace' with Reagan's excellent anti-ballistic missile program. It also pressurized USST to develop a system that was similar to his. Thus, option A is the correct answer.

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tenochtitlan (also spelled tenochtitlán), located on an island near the western shore of lake texcoco in central mexico, was the capital city and religious centre of the aztec civilization. the traditional founding date of the city was 1345 ce and it remained the most important aztec centre until its destruction at the hands of the conquering spanish led by hernán cortés in 1521 ce, which led to the final collapse of the aztec empire.