whiCh oF thE Following is truE, ACCorDing to thE pAssAgEA．EmAil shows morE Authority thAn othEr proDuCts oF DigitAl tEChnology.
B．EmAil is As FrAgilE A thing As it is ConvEniEnt to its usErs.
C．EmAil CAn kEEp As mAny As 1,500 sAvED mEssAgEs.
D．EmAil mAy hElp strEngthEn your own mEmory.