Answer:
B.
Step-by-step explanation:
B. Many studies show that the existence of the bald eagle has been threatened because of the use of pesticides.
Statement B is an arguable claim because it presents a specific assertion, and one could argue both for and against the idea that the existence of the bald eagle has been threatened by pesticide use based on the available evidence and differing perspectives. The other statements, A, C, and D, either present widely accepted facts (C) or subjective opinions (A and D) that may not be easily disputed.