Mark the statement if it correctly describes what happened during qin's rule.
a.
each state retained its own currency.
b.
a standardized system of weights and measures was adopted.
c.
the nobles moved to the imperial capital but continued to rule their districts.
d.
a standard width was adopted for carts.
e.
officials standardized the writing characters to have the same meaning.

separate but equal was a legal doctrine in united states constitutional law according to which racial segregation did not violate the fourteenth amendment to the united states constitution, which guaranteed "equal protection" under the law to all people. under the doctrine, as long as the facilities provided to each race were equal, state and local governments could require that services, facilities, public accommodations, housing, medical care, education, employment, and transportation be segregated by race, which was already the case throughout the states of the former confederacy. the phrase was derived from a louisiana law of 1890, although the law actually used the phrase "equal but separate

hope this : d

pls be more elaborate