What was the most important thing to occur in the first 50,000 years of the universe?
a. matter
c. mass
b. electromagnetic radiation
d. the doppler effect

Option B, Electromagnetic radiation

Explanation:

It was during this period , for the first time in 50, 000 years that the density of matter had surpassed the density of electron. It was found that at temperature of 16000 kelvin, the radiation get converted to matter . This era was termed as Matter Era or Atomic Epoch  in which the atom form remained intact and hence the the electrons remained attached to nuclei also it was found that Electromagnetic radiation decoupled during this phase.

Hence, option B is correct

b would be the right answer

question: which statement best describes the different properties of metals?

answer: they are shiny and bend without breaking.

since metals have certain characteristics properties, they include the following: they are ductile, malleable, shiny, hard, lustrous, flexible and they are good conductor of heat and electricity. so therefore, metals are not dull and they are not non-flexible as listed. instead, they are shiny and flexible.

hope this , have a good day. c;