Hi
I am looking for a PhD in any part of the world as long as I can get a scholarship. But I find a little bit challenge to understand which PhD I can apply for and not all the universities answer the emails. If anyone can help me to answer this questions.
1- Which one should I take GRE or GMAT?
2- My career is based in hospitality so I would like to do a PhD related to quality, strategy, organization or innovation. Which side should I go? economy? science? I've seen some related to arts also
3- Can I apply to different PhDs in the world at the same time?

I really appreciate your help, if you have any other tip it will be great!!!

Thanks

Carolina