Final answer:
The highest decoration awarded by the Navy is the Medal of Honor, which is the United States' most prestigious military decoration, awarded for acts of valor above and beyond the call of duty.
Step-by-step explanation:
The highest decoration awarded by the Navy is the Medal of Honor. It supersedes other awards such as the Distinguished Service Cross, Silver Star Medal, and Navy Cross in terms of prestige and honor. The Medal of Honor is the United States' highest and most prestigious personal military decoration, awarded to recognize U.S. military service members who have distinguished themselves by acts of valor. While General George Marshall awarded Frank Capra the Distinguished Service Cross in 1945 for his contributions to the war effort, and Jimmy Stewart received the French Croix de Guerre, these do not equal the highest Navy decoration. The Medal of Honor is awarded by the President of the United States in the name of the U.S. Congress, making it an exceptionally rare and noble award. Therefore, the correct answer is (d) Medal of Honor.