Researchers Often Employ Correlational Designs to Assess the Relation Between

Researchers often employ correlational designs to assess the relation between stress and physical health (e.g.Holmes & Rahe,1967) .One problem with this approach is that researchers using this method

A) cannot make definitive causal statements.
B) do not sample adequately from all age groups.
C) do not often use representative samples.
D) cannot analyze the data statistically.
E) rely solely on respondents self-reports.