When a canal and a drainage approach each other at the same level, the structure so provided, is

When a canal and a drainage approach each other at the same level, the

1.	When a canal and a drainage approach each other at the same level, the structure so provided, is
A.	an aqueduct
B.	a syphon
C.	a level crossing
D.	inlet and outlet.
Answer» D. inlet and outlet.