Well, that would really depend. The media's coverage at the time (It is important to remember that the Watergate Scandal happened at different times, thus different media) may have been exaggerated. One major effect of the scandal however, was that it caused President Nixon to resign from office.
Hope this helps ...
D. Powers are shared between state and federal government
A federal system means that there is shared power between the national (federal) government and a smaller, subsection of the country as a whole. In the case of the United States, the subsection are the states.
I beilive it is 4- The soviet union had recently begun builiding up a nuclear arsenal of its own.
Constantinopole was more in the middle of the Empire than Rome at the time. Additionally, it can be argued that he felt that Rome was becoming unsuitable: corrupted by the fights among politicians and not stable (under threat of attacks from Germanic tribes): Constantinopole was safer and more stable at the time.