its C. Getting others involved to help.
The answer is a I believe. Think of it this way: the bee _____ the bottle. Fill in a word there. If it makes sense, it's a preposition. I.e. The bee enters the bottle. The bee opens the bottle The bee is the bottle. There are a few acceptions, though.
Answer:
The German physicist, Wilhelm Conrad Röntgen was the first person to systematically produce and detect electromagnetic radiation in a wavelength range today known as x-rays or Röntgen rays. His discovery of x-rays was a great revolution in the fields of physics and medicine and electrified the general public.
Explanation: