Although we can divide the history of the universe into many distinct "eras," sometimes it’s useful just to have a broad perspective on what events occurred in the very early universe and what events occurred later. Listed following are events that occurred either before or after the first five minutes in the history of the universe. Match these events to the appropriate time period.
a. antielectrons (positrons) as common as electrons
b. temperature fell to 10^15K
c. strong force and electroweak force first became distinct
d. inflation occured
e. galaxies formed
f. photos of cosmic microwave
g. stars formed
h. carbon nuclei formed by fusion
if you already have the answer to (a), then just work out how many periods there are in 1 minute, and that's the answer to (c).
im not to sure what it is