Someone pls help me!

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted

How can studying economics us make better choices about how to use scare resources

Ano anu ang mga guhit na makikita sa mapa o globo? ibigay ang kuhulugan ng bawat isa