The given figure shows a subcritical open channel flow expansion (BC in the figure) of rectangular cross-section. With respect to the water level in the flume (A in the figure), the water level in expansion BC will:

The given figure shows a subcritical open channel flow expansion (BC i

1.	The given figure shows a subcritical open channel flow expansion (BC in the figure) of rectangular cross-section. With respect to the water level in the flume (A in the figure), the water level in expansion BC will:
A.	Rise
B.	Not change
C.	Fall
D.	First rise and then fall
Answer» B. Not change