A.their ability to escape from different regions of space.
B.their inability to penetrate dense matter.
C.the similarity of their structure to that of nucleons.
D.the infrequency of their interaction with other matter.

A.it can provide massive nucleons.
B.it is like a huge detecting apparatus.
C.it enables neutrinos to move more actively.
D.it can keep away the interference of other particles.
A.suggest the potential discovery of celestial bodies by means of neutrino astronomy.
B.illustrate the importance of surprises in making astronomic discoveries.
C.demonstrate the effectiveness of the DUMAND apparatus in detecting neutrinos.
D.name some cosmic phenomena that neutrino astronomy will illuminate.
A.profit opportunities.
B.the market.
C.the investors,
D.profit.