An experiment was designed using school children as subjects to determine whether milk prevented their catching colds. The researcher randomly assigned 100 school children to two groups - one group of 50 to receive a cup of milk at school each day and the other group of 50 to receive no milk at school. What is the response variable? Remember: The response variable is measured on the individual. A. Whether the child received a cup of milk at school each day
B. Whether the child caught a cold
C. The number of children who received a cup of milk at school each day
D. The number of children who caught a cold