For centuries, scientists believed that light waves traveled through a substance called "Ether." Which of the following facts refutes this belief? A. Light waves can propagate through a vacuum.
B. Ether has never been observed.
C. Light waves can have many different wavelengths and frequencies.
D. Light waves can travel extremely long distances.

Sorry my friend i don't know the answer. i am just in 6th

Mfjh f fb gcbb etyb yryh htbgh g yrjjj t n   j tj

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.