Question

The Nobel Prize for physics this year is for the discovery of the gravitational waves released by violent events in the universe such as the mergers of black holes. The first time this was detected was on September 14, 2015, by the LIGO-VIRGO collaboration. Since then three more detections have been made, the latest one on September 28, 2017. The discovery is due to an extremely delicate experiment. Gravitational waves were predicted by Einstein almost 100 years ago. _______________________.

From the given options, choose the one that completes the paragraph in the most appropriate way.

A It also throws up the possibility of detectors that can look at the beginning of the universe.

B After about 50 years of experimentation the waves were detected for the first time in September 2015.

C The discovery can pave the way for proving the general theory of relativity, so that we can look deeper and deeper into the universe.

D The discovery and the repeated detection (four times now) has made the possibility of gravitational wave astronomy very real.

E Gravitational wave astronomy is a way of mapping out some of the most violent processes in the universe such as black hole or neutron star mergers that cannot be detected with light or the conventional methods.

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