The correct answer is A) flying buttresses.
At S. Andrea in Mantua, the buttressing necessary to resist the lateral thrust of the monumental barrel vault is provided by flying buttresses.
A flying buttress is the kind of structure that is placed on another big structure in order to support or it or reinforce it. Old buildings such as churches were constructed using big concrete walls that had much weight on it. So architects had to add these flying buttresses to reinforce the walls and add more strength and resistance to the big walls.
At Sant'Andrea in Mantua, the buttressing necessary to resist the lateral thrust of the monumental barrel vault is provided by flying buttresses.
A buttress is a structure built against walls to support the building.
Basilica di Sant'Andrea has no internal columns to support the structure.
The chapel walls are supported by flying buttresses from outside, making the building strong and standing.
Therefore, we can conclude the flying buttresses played a major role in Sant'Andrea chapel.
Learn more about flying buttresses here:
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