linguistiCAlly, CompArED with thE writings oF mArk twAin, hEnry jAmEs's FiCtion is notED For his ______.
A．FrontiEr vErnACulAr
B．riCh ColloquiAlism
C．vulgArly DEsCriptivE worDs
D．rEFinED ElEgAnt lAnguAgE