The most likely scenario for fulfilling the order from a customer in England would be:
A. The guitar will be transported via the Interstate Highway System to the Port of Savannah, where it will be shipped overseas.
This option utilizes a well-established transportation route by highway to get to a major port for international shipping, which is a common method for transporting goods overseas. While the airport could also be a feasible option, shipping via a port is often more economical for larger items like guitars.