appropriate letter in the blank provided. 1. Our impact on the health of the oceans is much more profound than we often assume. You can do a lot to help save the oceans. First of all, take care of the environment. If you go to the seashore or go snorkeling or diving, do not disturb in any way the environment. Return any overturned rocks to their original positions. Leave all forms of life where they are. If you go fishing, know the regulations and take only what you really need for food. Return undersized fish. Corals and shells should be left alone, and alive, in their natural home. Be sure to tell merchants you object to their sale of shells, corals, sand dollars, and other marine life, which were most probably collected alive and killed for sale. Don't buy the yellowfin tuna that is caught in nets that trap dolphins. Look for the "dolphin-safe" seal on the label. Paragraph from Peter Castro, Marine Biology, 6th ed., New York: McGraw-Hill, 2003, p. 421. Copyright © 2007 McGraw-Hill. Reprinted by permission of The McGraw-Hill Companies, Inc.

a. cynical
b. serious
c. arrogant
d. outraged​