Which of the Following Is a Valid Statement of a Difference

Which of the following is a valid statement of a difference between Erikson's stage theory and Loevinger's stage theory of development?

A) Loevinger thinks movement to the next stage occurs only when the previous stage has been mastered; Erikson thinks stage movement occurs when social or biological circumstances force new issues.
B) Erikson thinks movement to the next stage occurs only when the previous stage has been mastered; Loevinger thinks stage movement occurs when social or biological circumstances force new issues.
C) Loevinger's stages are age-linked, while Erikson's are not.
D) Loevinger assumes that all adults move through all stages, while Erikson does not.