Test Coffee and caffeine

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QUESTION 1: DO FAT BURNERS USUALLY MAKE USE OF CAFFEINE IN THEIR COMPOSITION?

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QUESTION 2: CAN CAFFEINE ONLY BE ACQUIRED ARTIFICIALLY?

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QUESTION 3: IS CAFFEINE A NERVOUS SYSTEM STIMULANT?

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QUESTION 4: IS CAFFEINE EASILY ABSORBED BY THE BRAIN?

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QUESTION 5: DOES CAFFEINE USUALLY ACCUMULATE IN THE BLOODSTREAM?

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QUESTION 6: IS CAFFEINE ONLY FOUND IN COFFEE LEAVES?

This test is only available for students who have purchased the course
INCORRECT QUESTIONS

Is there any error or improvement?

Where is the error?

What is the error?