Let D30 = {1, 2, 3, 5, 6, 10, 15, 30} and relation I be a partial ordering on D30. The lub of 10 and 15 respectively is

Let D30 = {1, 2, 3, 5, 6, 10, 15, 30} and relation I be a partial o

1.	Let D30 = {1, 2, 3, 5, 6, 10, 15, 30} and relation I be a partial ordering on D30. The lub of 10 and 15 respectively is
A.	1
B.	5
C.	15
D.	30
Answer» E.