To find the product of \(\sqrt{12}\) and \(56\), we first calculate \(\sqrt{12}\).
\[ \sqrt{12} = \sqrt{4 \cdot 3} = \sqrt{4} \cdot \sqrt{3} = 2\sqrt{3} \]
Now we can calculate the product:
\[ \sqrt{12} \cdot 56 = 2\sqrt{3} \cdot 56 = 112\sqrt{3} \]
Next, we can find the numerical approximation of \(112\sqrt{3}\):
\[ \sqrt{3} \approx 1.732 \]
Now, we calculate:
\[ 112 \cdot 1.732 \approx 193.184 \]
Thus, \(112\sqrt{3} \approx 193.184\). This number is clearly irrational, since the product of a rational number (112) and an irrational number (\(\sqrt{3}\)) is always irrational.
Since none of the given numerical responses match this value of \(112\sqrt{3}\), it's clear that the question did not contain the correct answer in its options. However, we confirm that the value \(112\sqrt{3}\) is indeed an irrational number.
Thus, the product of \(\sqrt{12}\) and \(56\) is approximately \(193.184\) and it is an irrational number.