According to the big bang theory, after the "bang", the universe remained dark until about later, when neutral atoms began form.

*three minutes
*one billion years
*300,000 years
*three billion years

hotter stars = bluer stars

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer