What initially helped ASL spread as a new language ?

DEMOS LOS

Explanation:

1960

Oh sure, ASL has been used in America since the early 1800's (and earlier if you include the signing that was being done in America prior to Thomas Gallaudet bringing Laurent Clerc from France), but it wasn't until 1960 that "experts" started recognizing it as a full-blown autonomous language

Explanation:

here

use without a doubt, sounds professional and will make you sound like you know what you are doing

nobody knows everything, but parents are normally more experienced than their children based off of worldly experience despite the fact that a child might think that they know better than their parent in any given situation this might just be caused by ignorance and lack of experience.