Which of Kelly's corollaries implies that constructs can be altered?

The MacArthur Communicative Development Inventories (CDI)

a. assesses expressive language but not receptive abilities b. combines parent reports and checklists with a representative language sample c. cannot be used with children who are younger than 24 months old d. has little power for predicting which children will have language delays and which will develop within a normal range

To calculate the coefficient of determination, we:

a. square the correlation coefficient. b. take the square root of the correlation coefficient. c. multiply the correlation coefficient by 2 d. divide the correlation coefficient by 2