Final answer:
The Mongols had gained control over the Middle East and conquered Egypt by 1294.
Step-by-step explanation:
The answer is option A. By 1294, the Mongols had gained control over the Middle East and conquered Egypt and established dominance. In the previous centuries, the Mongols had expanded their empire to become the largest land-based empire in history, conquering vast territories. Their presence in the Middle East and their defeat of the Mamluks in Cairo solidified their control over the region.