This consists of the movement of ideas from one point of origin over a large span of time. This has to include the complete absorption of ideas into society, not just partially.
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The correct answer for the question that is being presented above is this one: "B. building of the transcontinental railroad --> disappearance of the frontier." The pair of events that did the first event most directly influence the second is the building of the transcontinental railroad --> disappearance of the frontier.
Answer: b. Collaboration that includes diverse backgrounds and perspectives can eliminate the need for software testing.
Explanation:
While collaborating and creating a team that includes diverse backgrounds and perspectives is good for anticipating the needs of the people that will use the software as well as avoid bias, it does not take away the need for software testing.
Software testing must always be carried out as it is a practical test that actually shows whether the software developed is going to match the needs and requirements of the end users.