Which musician is not considered a medieval composer?

Susye Billy, a basket weaver of the native Pomo people in California, has said natural materials for her craft are difficult to obtain because __________

A. not many stores carry them anymore B. they have become too expensive to buy in bulk C. land developers have changed the natural environment D. none of the above

A round arch consists of __________.

A. arcades and buttresses B. voussoirs and a keystone C. aisles and an apse D. coffers and a clerestory