in thE pAssAgE, thE Author is primArily ConCErnED with
A．summArizing thE FinDings oF A stuDy
B．plACing nEw rEsEArCh within its historiCAl ContExt
C．EvAluAting thE mEthoDology oF A historiAn
D．CompAring vArious DEmogrAphiCAl tEChniquEs
E．(E) EstABlishing CAtEgoriEs