A beaker of pond water containing few specimens of Euglena was placed in a dark room for two weeks. At the end of this period, the specimens of Euglena were still alive because they were
-
A.
able to carry out holozoic nutrition. -
B.
able to carry out photosynthesis using carbon dioxide in the pond water -
C.
better adapted to life in darkness than to life in light -
D.
not overcrowded