Step 1 :Calculate the value of the function at the given points, 1 and 2. This will help us determine if there is a sign change between these two points. If there is a sign change, then by the Intermediate Value Theorem, there must be a root between these two points.
Step 2 :Calculate \(f(1)\) and \(f(2)\) for the function \(f(x)=4x^{2}-2x-3\).
Step 3 :\(f(1) = 4(1)^{2}-2(1)-3 = -1\)
Step 4 :\(f(2) = 4(2)^{2}-2(2)-3 = 9\)
Step 5 :The function value at \(x=1\) is -1 and at \(x=2\) is 9. Since the function value changes sign between \(x=1\) and \(x=2\), there must be a root between these two points according to the Intermediate Value Theorem.
Step 6 :\(\boxed{\text{The correct statement is A. Since } f(1) \text{ and } f(2) \text{ are opposite in sign, there exists at least one zero between 1 and 2.}}\)