[tex]\text{Hello there!}\\\\\text{We're trying to find the common ratio}\\\text{The common ratio is the number that the sequence is changing by}\\\\\text{To find the common ratio, we need to find how much the sequence is}\\\text{changing by}\\\\\text{From -5 to -20, we know that it's multiplying by 4}\\\\\text{From -20 to -80, it's multiplying by 4}\\\\\text{Therefore, our common ratio is 4}\\\\\large\boxed{\text{Answer: C.\,\,4}}[/tex]
