How much of the moon is being illuminated by the sun at any given time?
a. less than 50%
b. 50%
c. between 50% and 100%
d. 100%

It would be 50% apart from if the earth was blocking some of the light in an eclipse I believe. Make of this what you will.

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

A,b,c is the answer to the question