Final answer:
The focus of the war shifted to the south, where the British captured Savannah and Charleston. The American forces in the South had success against the British inland.
Step-by-step explanation:
The correct answer is d. to the south, where the British captured Savannah that year.
In 1778, the British captured Savannah, Georgia, and began moving slowly northwards. They also took control of Charleston, giving them control of the two major southern ports.
The American forces in the South had success against the British further inland, preventing them from achieving the victories they needed to win the war.