it mAy BE ------- to oBtAin soAp thAt is not AntiBACtEriAl, givEn its ------- As A housEholD ClEAnsing proDuCt, But ACCorDing to A nEw stuDy, suCh proDuCts mAy BE A wAstE oF timE.
A．DiFFiCult... uBiquity
B．impruDEnt... wEAknEss
C．trADitionAl ... rElEvAnCE
D．rEvolutionAry ... innovAtion
E．(E) ExtrAvAgAnt... ExpEnsE