Why Islam?

Assalamu alaikum brothers!

I was recently approached with a question to which I've been looking for a suitable answer.

Mention three NON-RELIGIOUS reasons as to why a non-Muslim should accept Islam.

(I know there could be hundreds of reasons)

Can anyone educate?

Ramadan Mubarak to all!

http://www.deoband.org/2010/03/aqida/allah-and-his-attributes/clearest-rational-argument-for-the-existence-of-a-creator/

A possible rational reason one could put forward, a bit long but hope it helps. This however answers 'why god' and not 'why islam' but nonetheless it could still be a starting point. I don't understand though why three reasons are needed, whereas one flawless reason should be enough.