Why did the death of Francisco Franco lead to a resurgence in the popularity of castell building?

A. After Franco's death, parents were no longer reluctant to permit their young children to participate in physical activities.
B. The end of the Franco regime made people see that working hard was not that important.
C. After Franco died, the Spanish government was eager to erect buildings in his honor.
D. The lifting of restrictions that Franco had imposed allowed for greater expression of the Catalan culture.