Which of the following accurately describe some aspect of gravitational waves? select all that apply. (a) gravitational waves come from funnel-shaped regions of the universe(b) gravitational waves are predicted to travel through space at the speed of light(c) the existence of gravitational waves is predicted by newton's universal law of gravitation(d) the first direct detection of gravitational waves came in 2015(e) the existence of gravitational waves is predicted by einstein's general theory of relativity(f) gravitational waves carry energy away from their sources of emission(g) gravitational waves are an extremely low-energy form of light