You are presented with the quiz "What can a certain protein affect in meat?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cartilage is a tough tissue that contains a protein called collagen" and "collagen contributes to meat toughness". So, what's the best answer to the question?
pick from the following. (I). health (II). piousness (III). stamina (IV). retina (V). toughness (VI). liveliness (VII). saltiness (VIII). Energy
(V).