School Faculty Address System Using Arduino and Android

Hi, I am very new to this stuff and I am looking for your help.

I'm about to build a simple project which concept is a Public Address (PA) System.
I am required to use my own developed ANDROID application as an input device.
I am also required to use Arduino technology as part of the course.
Using the Android App, the user(school admin) can choose either one or all faculty he want to address;

I have already developed my Android audio recording app.
My problem is I need to stream the audio to Arduino Speakers.
I am required to connect devices wirelessly and I don't know what to choose between NRF24L01, ESP8266, and Bluetooth for communication.

My friend suggested that i should use bluetooth for sending the audio from Android to Arduino reciever and NRF24L01 for passing the audio stream from Arduino reciever to Arduino Speakers.

His concept was:
Android --> Reciever/Streamer --> Reciever/Speakers

I already bought ceiling speakers as audio output for my arduino speaker.

NOW, I'm looking for your advice.
I would like to ask you what kind of wireless communication should i use.
Could you give me some links that would help me build the project please..

DON'T CROSS POST!!!!!!!!!!!!!!!!!!!!

...but this thread is the original, just eight minutes older than its now sadly-departed twin.

I go off the most appropriate forum section or the thread that has received more/better replies, not which came first. A quick glance at the question indicated it was "what kind of wireless communication should i use" so I thought Networking was the better forum section, therefore I screamed on this one but it really doesn't matter and likely the Project Guidance section has more eyes.

I am sorry for the cross post...
I'm about to delete this (first) post when I realized that I posted it on a less appropriate section but i can't find delete post so i reposted it on other section..
Could anyone please answer my concern?
I still have no idea what wireless communication should i use for the project.