Final answer:
The English struggled to capture Fort Quebec due to the harsh Canadian winter that isolated British forces and prevented reinforcements from arriving, prompting an urgent yet under-resourced siege attempt by the American forces. correct option is B
Step-by-step explanation:
The English had a difficult time capturing Fort Quebec primarily due to harsh Canadian winter conditions that led to the isolation of British forces. By December, the St. Lawrence River was frozen, preventing General Sir Guy Carleton from receiving reinforcements and necessitating a defense with the limited soldiers available. The American forces, led by Colonel Benedict Arnold, lacked the resources for a proper siege and faced dwindling enlistment times, signifying the urgency for a quick assault before British reinforcements could arrive in the spring.