*hurry its for a quiz* in a vacuum, waves from all parts of the electromagnetic spectrum move: a. with a speed that depends on their energy. b. with a speed that depends on their frequency. c. at a speed of light, 300,000,000 m/s. d. with a speed that depends on their wavelength.

The answer is C. at the Speed of light, 300,000,000 m/s

You need to know that there exists a large family of waves, each with a different wavelength range, called the electromagnetic spectrum (sometimes shortened to the e-m spectrum). These waves all travel at the speed of light (300,000,000 metres per second) in a Vacuum

Good Luck on your test btw

mass and volume are the answers you are looking for