A I think that a bar graph would best represent this information.
I think it’s the andromeda cause scientists have said that Andromeda might be eating Milky Way.
The correct answer is option B. X-rays are the waves found in the electromagnetic spectrum at a wavelength of 1x10^-11 - 1x10^-8 m and frequencies of 3x10^16 to 3x10^19 Hz. These waves penetrate easily through certain materials which made them usefule in the field of medicine.