One-third of the speakers gave two speeches each.
A.1 alone is sufficient while 2 alone is not sufficient
B.2 alone is sufficient while 1 alone is not sufficient
C.Either 1 or 2 is sufficient
D.Both 1 and 2 are sufficient
Answer:D
One-third of the speakers gave two speeches each.
A.1 alone is sufficient while 2 alone is not sufficient B.2 alone is sufficient while 1 alone is not sufficient C.Either 1 or 2 is sufficient D.Both 1 and 2 are sufficient