What development first helped people shape their communities through
informed decisions?

The development of a simplified alphabet.

Explanation:

by trying your best others ^_^

but don't try sending them fake answer, it must to be real answer.

the reason why you must not send them fake answer cause the experts and the questioner will moderate you and if they find out its fake they will report your to the owner of this website which its called

explanation:

answer; i believe that technician a is correct;