All three factors contributed to the French forces' success at Fort Duquesne, albeit to varying degrees:
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The French outnumbered the British: This was indeed a factor, as having greater numbers can provide a significant advantage in battles.
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The French used guerilla warfare tactics and ambushed the British: This tactic was particularly effective in the dense terrain of North America and played a crucial role in challenging the British conventional fighting style.
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The British troops were split in their loyalties between Braddock and Washington: This division could have affected morale and coordination among the British forces, leading to confusion during the engagement.
In summary, all three factors played a role in the French victory at Fort Duquesne, making them important elements to consider.