GCF, Greatest Common Factor.
Answer:
the first one. with two shaded dots and a line between them
The idea of using 4 because it's a factor is the wrong choice. If the equation were 5x = 88 and you divide by 4, you aren't getting a single 1x alone. So the "divide because it's a factor" choice is wrong.
Dear Mathproblemshurt, to be honest, you never really needed the number of websites in the world. It is for the fact that it asked for the percent of inactive websites and they gave you the fraction of inactive websites. Just do 2/3 to get 33.3%.