The states that between 15 and 20 billion years ago, the universe began expanding out of an enormous explosion. a. h-r diagram c. big bang theory b. binary star theory d. "big crunch" theory select the best answer from the choices provided

ilikeair12 history; do you think the american dream is still attainable? kristinalovestae history; which of the following describes a technological accomplishment of the 1920s a. the completion of the panama canal b. the solo non-stop transatlantic

hope this : d

c)an idealized view of nature. hope this