This can easily be answered by looking up their names or "the Watergate scandal" on Google. If you didn't have access to Google, however, you should know that the Watergate scandal involved former President Nixon spying on his political opponents at the Watergate hotel. Although this is not infallible logic, if you had to make an 'educated guess', Nixon was the president at the time. The president lives in Washington D.C, the US capital. This should lead you to believe that the Washington Post might have uncovered this scandal. Indeed those two reporters worked for the Washington Post.
I believe the answer is: 3. The canals and temples in the city show advanced engineering skills.
The site shows that the Aztec civilization had developed a very advanced irrigation system that utilize different elevation to obtain water for their agricultural field. Their system was later adopted by the spanish empire who invaded their territory.
I want to say A a factory employs many workers doing different jobs to produce a car. Factories do mass producing
