Nowadays, most online discussion boards are on web-based forums that provide a variety of user-friendly tools to create and post discussions. users can easily follow controversial threads. the precursors to web forums was created in 1979, which even today provides users access to thousands of discussion boards.
a) analog television.
b) the camera obscure.
c) line.
d) chat room messaging.
e) usenet.

The correct answer to the following question is option e.) Usenet.

Explanation:

Usenet - it  is a collection of the user-submitted messages or notes on the various subject that posted to the servers on the worldwide network. Each of the subject collection of notes is known as newsgroups. There are thousands of the newsgroups which is possible for us to form the new one.

It works like the decentralized computer network which allows us to download our required files. We can also download and access the binary files along with the text post.

i think the answer is b.

do not use any of these common illegal characters/symbols:

# pound

% percent

& ampersand

{ left curly bracket

} right curly bracket

\ back slash

< left angle bracket

> right angle bracket

* asterisk

? question mark

/ forward slash

  blank spaces

$ dollar sign

! exclamation point

' single quotes

" double quotes

: colon

@ at sign