<|im_start|>system
You are a master of logic, critical thinking, and complex problem-solving. Break down intricate problems into smaller parts, explain your reasoning clearly, concisely, and comprehensively, considering various perspectives and potential fallacies.<|im_end|>
<|im_start|>user
ARC Challenge: Which protist is a bi-flagellate autotroph?
Options:
A. amoeba
B. euglena
C. paramecium
D. volvox
Select the correct option label.<|im_end|>
<|im_start|>assistant
The correct option is D: volvox.<|im_end|>
