What was the amount of homework that prevented the group from going to the cinema?

The correct response indicates that the amount of homework was excessive, which became an obstacle for the group to go to the cinema. The term "too much" signifies that the workload was beyond what they could manage, leaving them with no time to enjoy other activities, such as going to the cinema. This highlights the concept that an overwhelming amount of work can limit one’s ability to engage in leisure activities.

In contrast, other options suggest varying levels of homework that would not have interfered with their plans. If there was "too little," "just enough," or "none at all," those situations imply that they would have been able to go to the cinema without any issues. Thus, the emphasis on the "too much" homework appropriately illustrates the conflict between academic responsibilities and social activities.