Final answer:
Without further context, we can speculate Good Will pulled Christian into the gate swiftly to protect him from danger, which is a common theme in allegorical literature.
Step-by-step explanation:
The question refers to a scene in which Good Will pulls Christian into the gate rapidly. Without additional context, it is challenging to determine the exact reason.
However, if we were to speculate based on the possible choices provided and common themes within allegorical narratives, we might assume that Good Will acts out of a protective instinct to save Christian from an approaching danger, such as protecting him from an enemy or perhaps to prevent him from falling into despair, which are thematic elements often found in literature that explores spiritual and moral journeys.