Q) In correlation design of Ex Post Facto Research,we study
Options:
A)The variable which has been measured in advance and will be work as an causative factor for second variable
B) The second variable which is going to be measured and will work as a causative factor for antecedent variable
C) The third variable which can not be measured but work as a causative factor for first and second variable
D) All the above three situations and occurrence of variables