Dalton hypothesized that atoms are indivisible and that all atoms of an element are identical. it is now known that a) all of dalton's hypotheses are correct. b) atoms of an element can have different numbers of protons. c) atoms are divisible. d) all atoms of an element are not identical but they must all have the same mass

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