Which of the following statements is FALSE while determining the relative strengths of the items of ...

Which of the following statements is FALSE while determining the relative strengths of the items of bivariate relationships?
 
  a. Be wary of including items in a composite measure that are not related to one another empirically.
 b. One should probably drop any item that is not related to several other items in the composite measure.
 c. variable very strong relationship between two items presents a problem.
 d. One must check the bivariate correlations between all items that one plans to include in the composite measure.
 e. You should strive for perfectly correlated (1.0) indicators within a composite measure.