whAt is thE Author’s mAin mEssAgE in thE lAst two pArAgrAphsA．thE prACtiCE oF FrugAlity is oF grEAt importAnCE
B．ExtrAvAgAnt spEnDing woulD Boost EConomiC growth
C．onE’s liFE ExpEriEnCE woulD turn into liFElong hABits.
D．CustomErs shoulD ExpECt DisCounts For luxury gooDs.