The Product Rule of Exponents states that when you multiply two expressions with the same base, you add their exponents. In this case, we have:
\[ 1008 \cdot 1007 = 100^{8} \cdot 100^{7} \]
According to the Product Rule:
\[ 100^{8} \cdot 100^{7} = 100^{8 + 7} = 100^{15} \]
Therefore, the correct simplification of the expression \(1008 \cdot 1007\) using the Product Rule of Exponents is:
100^{15} (100 superscript 15 baseline).