Which model is a concordance model? A.
the big bang theory

B.
the dark energy model

C.
the steady state model

D.
the Lambda-CDM model

ANSWER:

D.

EXPLANATION:

The ΛCDM or Lambda-CDM model is a parametrization of the Big Bang cosmological model in which the universe contains three major components: first, a cosmological constant denoted by Lambda and associated with dark energy; second, the postulated cold dark matter; and third, ordinary matter.