What was Gutenberg's advance over existing methods of mechanical printing?

Promoting a product as "all natural" is a greenwashing sin because it is so broad that it has no valuable meaning to the general public. This would fall under which category of greenwashing sins?

A) no proof B) hidden trade-off C) vagueness D) irrelevance E) lesser of two evils

Your self-concept develops from at least three of the following sources

A) books you read, your parents, your own evaluations within your culture. B) comparisons with others, others' images of you, your own evaluations within your culture. C) others' images of you, movies/films/pictures, comparisons with others. D) your own cultural interpretations, social comparisons with others, physical activities.