Why Aren't Optical or Radio Telescopes Used in Particle Astronomy

Multiple Choice

Why aren't optical or radio telescopes used in particle astronomy, which studies cosmic waves and gravity waves?

A) Cosmic and gravity waves are too dangerous to detect.
B) Particle astronomy can only be studied in deep space.
C) Cosmic and gravity waves are too large of particles for ground-based telescopes.
D) Optical and radio telescopes can only detect electromagnetic radiation.
E) Optical and radio telescopes are not technologically advanced enough to capture these particles.