What would most likely cause the future acceleration of the expansion of the universe? radiation from the Sun the existence of background radiation the continued existence of dark energy light shifts identified by the Doppler effect

The continued existence of dark energy would most likely cause the future acceleration of the expansion of the universe. As what the United States, Saul Perlmutter and Adam Riess and Australia's Brian Schmidt had said, the universe is also speeding up in addition to its expansion that's caused by the dark energy.

the continued existence of dark energy