Final answer:
The correct answer is C. Joan of Arc escorted Charles VII to Reims for his coronation in 1429, choosing him over the English claimant to the French throne and aiding in restoring French morale during the Hundred Years' War.
Step-by-step explanation:
In 1429, Joan of Arc escorted Charles VII to Reims and was by his side as he was crowned. This event was pivotal during the latter part of the Hundred Years' War, which was a series of conflicts waged between the Kingdom of England and the Kingdom of France, along with various allies over the right to rule the Kingdom of France.
Joan of Arc, a young peasant girl, inspired by her visions, played a significant role in lifting the siege of Orléans and leading Charles VII to his coronation. This critical act strengthened the position of Charles VII and ultimately contributed to the shift of power towards the French in the Hundred Years' War. Her presence and military successes invigorated the French campaign and facilitated Charles VII's acceptance as the rightful heir to the French throne, which was contested due to a previous treaty that disinherited the French crown from Charles VII in favor of Henry VI of England.