All not-for-profit theatre is amateur

One reason head charts were favored by territory bands is that

a. many of the players in these bands were great sight readers b. many of the players in these bands were not music readers c. it was important to play tunes that people recognized d. they were published in such large quantities that they were inexpensive

Identify and describe two important architectural features of a Gothic cathedral, using examples from specific cathedrals

Please provide the best answer for the statement.