Choose the correct statement about the protist given in the diagram below .

Options

A. These microscopic organisms float passively in water currents and are found in both marine and freshwater environments .
B. These protists are generally biflagellates , of which one lies longitudinally and the other transversely in a furrow between the wall plates.
C. These biflagellate protists are autotrophic in the sunglight and heterotrophic in its absence .
D. Their cell wall has stiff cellulose plates on the outer surface and deposits of such is known as diatomaceous earth .

Answer

B