I think its C. they recognized Abu Bakr as the rightful caliph of islam.
I believe the correct answer would be the first one, but I'm not 100% on this. Hope I was able to help though!
-TTL
Answer:The Guamindang and the Communists united against Japan.
Explanation:
This should help!
Anubis was thought to be a Jackal by many, but he is infact a wolf.
So A is the answer