what is a groin vault?\na. a groin vault is a structure that resembles the top half of a sphere.\nb. a groin…

what is a groin vault?\na. a groin vault is a structure that resembles the top half of a sphere.\nb. a groin vault comes from the extension of a round arch, similar to a long tube of arches.\nc. a groin vault has two barrel vaults of the same diameter which cross or intersect one another.\nd. a groin vault has two barrels which extrude into a two - dimensional structure.\nplease select the best answer from the choices provided\no a\no b\no c\no d
Answer
Brief Explanations:
A groin vault is formed by the intersection of two barrel - vaults of the same diameter. Option a describes a dome, option b describes a barrel - vault, and option d has an incorrect description as groin - vaults are three - dimensional.
Answer:
C. A groin vault has two barrel vaults of the same diameter which cross or intersect one another.