单选题 根据下面的内容，回答题.

Which might be the most appropriate title of the passage?

A．At the Threshold of Neutrino Astronomy.
B．Neutrinos and the History of the Universe.
C．The Creation and the Study of Neutrinos.
D．The DUMAND System and How It Works.

A．have been detected for 25 years.
B．possess a variable electric charge.
C．are usually extremely massive.
D．record information about their own origin.

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.