Concept:The correct word must be the opposite of "facilitate" because the sentence contrasts two ideas.
Explanation:"Facilitate" means to make progress easier.
The phrase "not to ...... but to facilitate progress" shows that education should not block progress.
"Impede" means to hinder or slow down, which directly opposes "facilitate."
"Prevent" means to stop completely, which is too strong.
"Restrain" means to hold back, and "stampede" means to rush or panic.
Thus, "impede" gives the clearest contrast and fits the sentence best.
Answer:B. impede