Hey can you me posted picture of question

The factor that is common to both the terms of the expression is 5. So it can be taken out as common to factorize the expression.

5x - 15
= 5 (x - 3)

The expression cannot be factored anymore beyond this point. So this is the final factorization of the given expression.

Thus the answer to this question is option B

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.