I think you need to show the passage first to get ur answers
The right answer is rounded arches.
Gothic buildings were designed to be more heavenly with large open spaces. The difference in vaulting and arches allowed the construction of impressive tall designs that supported the increased height of the towers. New design elements allowed for redistribution of weight, so towers would not crush themselves. One of the new elements was the pointed arches: Much more supportive than rounded arches, that also gave the illusion of pointing towards heaven.
Nothing that involves mortimer and laura
When your given a formula it is made available to you once you know all the possible variables.
hope this works.