Which of the Following Is(are)correct

Which of the following is(are) correct?

A) The aroma and flavor of fine red wines is obtained by aging the wine in barrels made from white oak.
B) The best method is to age the wine in tanks with oak chips.
C) For most red wines,a second fermentation in the barrel is a necessity.
D) During bottling,wine is placed in sterile bottles that are flushed with pure oxygen to prevent aging.
E) Champagne,strictly speaking,is a sparkling wine produced only by Dom Perignon.