After a heavy rainfall and the formation of a large pond, the most likely sequence of changes in the vegetation of the pond is
-
A.
Euglena → water lily → Spirogyra → grass -
B.
water lily → Spirogyra →grass → Euglena -
C.
Spirogyra → Euglena → grass → water lily -
D.
Euglena → Spirogyra → water lily → grass