There are six questions below，
A researcher has designed an experiment to evaluate a theory about the health benefits of exercise at differ-ent times during the day．Nine subjects—F, G, H, J, K, M, O, P, and S—must be divided into three groups of three subjects each．Group 1 will exercise in the morning; group 2 will exercise in the afternoon; group 3 will exer- cise in the evening．The researcher must assign subjects to groups according to the following conditions：
F must be assigned to group 2．
H must be assigned to the same group as O．
J cannot be assigned to group 2．
M cannot be assigned to group 3．
P cannot be assigned to the same group as S．
Which of the following is an acceptable assignment of subjects to the three groups？
| Group1 | Group2 | Group3 | |
| A | F, M, P | H, J, O | G, K, S |
| B | G, J, M | F, H, O | K, P, S |
| C | G, K, P | F, M, S | H, J, O |
| D | H, J, M | F, G, P | K, O, S |
| E | H, O, P | F, G, J | K, M, S |
If H, J, and O are assigned to group 1, which of the following must be assigned to group 2？
If O is assigned to group 2,which of the following could be the subjects assigned to group 1？
If G, J,and M are assigned to group 1, which of the following must be assigned to group 2？
If G, K,and S are assigned to group 1, which of the following must be the subjects assigned to group 3？
If G, J,and P are assigned to group 1, which of the following must be true？