Why Has It Been Proposed That a Dimensional Approach to Classification

Why has it been proposed that a dimensional approach to classification should be adopted in the DSM?

A) People who need help may not be receiving it because they fall short of diagnostic criteria.
B) There are too few categories to cover every possible disorder.
C) Either people have a mental disorder or they do not.
D) Stigmatization occurs far too often when people are categorized.
E) Clinicians would find it much easier to agree on who should receive a diagnosis and who should not.