An assembly of hearers

A. Audience

B. Crowd

C. Congregation

D. Assemblage

Answer: Option A

Solution(By Examveda Team)

One word substitute is Audience.

Audience: the assembled spectators or listeners at a public event such as a play, film, concert, or meeting.
Crowd: a large number of people gathered together in a disorganized or unruly way.
Congregation: a group of people assembled for religious worship.
Assemblage: a collection or gathering of things or people.