In comparative research, we might run into trouble if the specific relationship of cause and effect cannot be made clear; sometimes, the variables may be both cause and effect in a relationship with one another. this is known as

Endogeneity.

Explanation:

When one of the explanatory variables of a comparative research is determined together with the dependent variable and this causes the specific cause and effect relationship to be unclear, we are facing an example of endogeneity.

In endogeneity a variable is related to changes in the pattern of behavior within a system. Thus, the causes of an effect (in a comparative search) may change, so the search can no longer be explained with the cause and effect relationship, so the endogeneity variable must always be associated with a error rate.

answer; i believe that the correct answer is (tabula rasa);

answer; ///i believe the correct answer is (b) the writing of the ancients who lived in india after the indus valley inhabitants died out;