One Prominent Feature Recently Identified Within Many Energetic Close Binary

Multiple Choice

One prominent feature recently identified within many energetic close binary star systems as a result of their mutual interaction and mass exchange is

A) two oppositely directed high-speed jets of matter leaving the system.
B) planetary formation between the stars, emitting IR radiation from molecular constituents and dust.
C) the beginnings of spiral arms, showing the possible origin of spiral galaxies.
D) a cool dust cloud surrounding the whole star system, hiding it from visible view.