I believe it is B if im wrong forgive me.
Answer: a, Germanic kingdoms eventually gave power back to the Romans
N 1890, Captain Alfred Thayer Mahan<span>, a lecturer in naval history and the president of the United States Naval War College, published The Influence of Sea Power upon History, 1660–1783, a revolutionary analysis of the </span>importance<span> of naval power as a factor in the rise of the British Empire.</span>