Provide an appropriate response.If 
f(x) = 1, 
f(x) = -1, and f(x) is an even function, which of the following statements are true?I. 
f(x) = -1II. 
f(x) = -1III. 
f(x) does not exist.
A. II and III only
B. I and III only
C. I and II only
D. I, II, and III
Answer: B
Mathematics
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A. 
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D. 
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