Roger Boisjoly provided a Presidential commission with documents supporting his hypothesis about how the cold temperature had causes the failure of an O-ring on the Space Shuttle Challenger. For this action, Boisjoly was labeled a .

whistleblower

Explanation:

Whistleblower refers to Someone from within an organization who informs about the shady/unethical activities that the organization was doing to people outside of the organization. (Roger revealed that some part of the equipment made by his organization was malfunctioning)

In united states, whistle blower is legally required to be given a certain level of protection depending on how much danger the whistlers put themselves in by revealing the information.

industry had made the u.s. the richest nation in the world at this time. the second industrial revolution caused growth in industry and transportation, which allowed increased trade between nations.

i dont know sorry why dont you looking it up on google