The answer is A: sinking because gothic means something’s gloomy and eerie. Sinking is the only word that is gloomy and eerie. Hope this helped!
A. using the dictionary is the only necessary step in the process of vocabulary building.
It means that the state cannot control everything although they may want to
Yes because it has a subject which is both of the candidates and a verb that begins to explain what they are doing or normally do. They radiate confidence on camera.
"Both of the candidates" can be replaced with the word "they" and that may help you when deciding what is considered a complete sentence.