Answer:
A. scandals that damaged the reputations of various presidents.
Step-by-step explanation:
All of the above are examples of major scandals that happened while certain presidents were in office.
Credit Mobilier was in 1867, Teapot Dome 1921-1923, Watergate 1972.
The most talked-about scandal would be the Watergate since it was a major letdown at the time and the most recent one.