Choose the word or phrase that could best explain the underlined word or phrase in each sentence

Choose the word or phrase that could best explain the underlined word or phrase in each sentence.
1. The floor was covered in tiny pieces of paper.
A. unimportant B. very large C. extremely small D. many
2. If modern technology did not exist, we would never have such precious information.
A. detailed B. precise C. confidential D. valuable
3. Some marine animals are dangerous to humans.
A. living in the mountain C. living in the ocean
B. living in the forest D. living in the house
4. Sperm whales and sharks are carnivores.
A. animals that only eat plants C. animals that eat meat
B. fish that aren't bỏn from eggs D. animals that live in the sea