How to wear a NATO strap...

I found this on the Internet. It shows how to terminate the end of a NATO strap. I suspect it could work for a Zulu strap as well...

Anyway, from the photograph, I know of the A and B method of termination, but C and D is new to me. I have to say it is interesting...

Photograph: shamelessly borrowed from the Internet

I myself have terminated the strap using method A and B. C would be interesting but perhaps a bit fiddly? As for D, there is a chance the strap end could come lose unless the hardware can lock the strap end or the strap could get tangled since it is looped over the hardware? 

Maybe I will try method C and D one day....