Final answer:
To rewrite the sum 3x + 15 as a product, we need to find the greatest common factor (GCF) of the terms. The GCF is 3, so the sum can be rewritten as 3(x + 5).
Step-by-step explanation:
To rewrite the sum 3x + 15 as a product, we need to find the greatest common factor (GCF) of the terms. In this case, the GCF is 3. We can factor out the GCF from the sum, giving us 3(x + 5). Therefore, the correct option is A) 3(x + 5).