Answer:
Option B is correct.
Step-by-step explanation:
Option A:
graph of this function is attached.
Maximum value does not exist for this function.
Option B:
graph of this function is attached.
Maximum value does exist for this function.
Option C:
graph of this function is attached.
Maximum value does not exist for this function.
Option D:
graph of this function is attached.
Maximum value does not exist for this function.
Therefore, Option B is correct.