A Simplified List of Characteristics of "Algae" Includes the Following

A simplified list of characteristics of "algae" includes the following: Green Algae - mostly freshwater,cell wall,chlorophylls a and b
Euglenoids - mostly freshwater,no cell wall,chlorophylls a and b
Brown Algae - mostly marine,cell wall,chlorophylls a and c
Diatoms - marine and freshwater,cell wall,chlorophylls a and c
Dinoflagellates - mostly marine,cell wall,chlorophylls a and c
Red Algae - mostly marine,chlorophyll a and phycobilin From examination of this restricted set of data,and referring back to discussions of systematics and taxonomy,it is most likely that the most primitive algae

A) were marine.
B) were freshwater.
C) contained cell walls.
D) contained chlorophyll a.
E) contained chlorophyll c.