Respuesta :
Answer:
A. increased dramatically as the arms race heated up.
Explanation:

From the given graph, it has been observed that the defense spending of US country rises with the rise in the arms race.
Option A is the correct answer.
What is spending?
Spending is the task of using the funds or money by the government for monitoring the affairs of the country.
Defense spending means the amount spent by the government of the US on arms, ammunition, and military services. According to the time span between 1948 till the year 1968, the spending done by the US government on the defense system has risen over the period of time.
Therefore, the rising in the arms race has occurred due to the rising in US defense spending as analyzed from the provided graph.
Learn more about the defense system in the related link:
https://brainly.com/question/11991799
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