which list all the factors of a composite number?

a.1,7,21
b.1,11
c.1,5
d.1,5,25

To find all the factors of a composite number, you need to divide it by different numbers and check for divisibility. The factors of a composite number are the numbers that divide it evenly without leaving any remainder.

Let's take a look at each option to determine which one lists all the factors of a composite number.

a. 1, 7, 21: This is not the correct answer because it only includes some of the factors of the composite number.

b. 1, 11: This is not the correct answer because it only includes some of the factors of the composite number.

c. 1, 5: This is not the correct answer because it only includes some of the factors of the composite number.

d. 1, 5, 25: This is the correct answer because it includes all the factors of the composite number.

Therefore, the correct answer is option d. 1, 5, 25.