Answer:
The correct answer is "All protists are unicellular and microscopic in nature".
Step-by-step explanation:
Protists are unicellular and microscopic eukaryotic organisms that could not be classified as plants, animals or fungi. These organisms have no common ancestor and are classified together more as a convenient an unofficial fashion. Some examples of protists include slime molds, algae, amoebas and other microorganisms.