Fossils of the first animals are rare because they

a. were large and likely to be eaten by others after they died.

b. lived only in volcanic regions, and were destroyed by lava flows.

c. were soft-bodied and tiny, therefore unlikely to fossilize.

d. had hard shells that broke down easily, leaving no trace

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous