Need . first to answer correctly gets brainliest

It is C. You need to apply formula A^2 - B^2 = (A+B)(A-B) 

(4b^2-16) is an example of what is called a difference of squares because each term is a squared value.  It has the form:

(a^2-b^2) which always factors to (a-b)(a+b)

In this case the square root of 4b^2=2b and the square root of 16=4 so its factors are:

(2b+4)(2b-4)  now we can factor out 2 from both terms...

2(b+2)2(b-2) to get

4(b+2)(b-2)  (answer B.)

Ralph is earning 2.8% commission