How was Sir Leonard Woolley able to surmise that Queen Puabi's court probably drank from a cup that held a sleeping drug?

A.
by piecing together clues from the grave pit that he excavated

B.
by deciphering the cuneiform found on clay tablets in the pit

C.
by listening to ancient stories that had been passed down

D.
by finding written evidence that described the ceremony

Question

How was Sir Leonard Woolley able to surmise that Queen Puabi's court probably drank from a cup that held a sleeping drug?
 
 A.
by piecing together clues from the grave pit that he excavated
 
 B.
by deciphering the cuneiform found on clay tablets in the pit
 
 C.
by listening to ancient stories that had been passed down
 
 D.
by finding written evidence that described the ceremony