Most brazilians are descendants of which combination of

a) mayan, mexican, and mestizo
b) native american, african, and european
c) portuguese, spanish, and incan
d) spanish, ladino, and french

plz give me the right one.

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

explanation:

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."