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The invention of photography was initially important because

Wich of the following is true about social classes. a.they are mainly based on gender.b.people in most society's cannot improve their status.c.they are mainly based on age.d.they can improve their satus by getting a good education.

Escoge el mandato que aplica a la siguiente situación. eres dueño de un restaurante y no te gusta el humo de los cigarrillos. no fume. no entre. no toque.