If a deep ocean trench is located adjacent to a continent, active volcanoes would likely be found landward from the trench.
Runoff in neighborhoods can be a problem because as the water runs it can collect pollutants such as oil, pesticides, bacteria, etc. These pollutants can end up in our drinking water or can run into our fishing supply and even our swimming water... I wouldn't want to be swimming or eating fish that was swimming in pesticides and bacteria.
Complementary strand of mRNA would be: AAUCGGAAC
In short, Your Answer would be Option C
Hope this helps!