Which sentence discusses medium of its subject

“the globe theatre is housed in an open arena the layout of the open air arena, featured the ‘ pit’ or the ‘yard’. the globe had a raised stage at one end and was surrounded by three tires of roofed galleries with balconies overlooking the back of the stage. the stage projected halfway into the ‘pit’”. i hope this information you .

Ithink it's a. but i could be wrong because it might be b. but it's not the other two