19. How could consumers evaluate the cleanliness of product? (A) Ignore the front-of. pack label. (B) Inquire the back-of-pack label. (C) Verify healthy food. (D) Sclect organic food.

10. What's the main purpose of this study? (A) to study the appearance of Chenopodium formosanum, (B) to investigate the antioxidant activity of fermented djulis (C) to investigate the influence of production cost on probiotcis, (D) to raise fund from foreigners.