Answer :
I'm not an expert at this subject, but what I think of it is:
- Europeans believed cultural exchange would improve international relations - it wasn't exchange but a convertion, so it's not too strong point
- Africans and Asians were continually at war over religious differences - even if, Christians were at war too, so it wouldn't change much
- Europeans believed Christianity would make people more civilized - maybe, however word 'civilized' could have different meaning in Europe, Asia and Africa
- Europeans wanted to expand their power around the world - that's the point, and they were more less successful as we can see today
- Africa and Asia wanted to become part of the European empire - I don't think so, I would stay as far as possible from Europe at that time
- Europeans believed cultural exchange would improve international relations - it wasn't exchange but a convertion, so it's not too strong point
- Africans and Asians were continually at war over religious differences - even if, Christians were at war too, so it wouldn't change much
- Europeans believed Christianity would make people more civilized - maybe, however word 'civilized' could have different meaning in Europe, Asia and Africa
- Europeans wanted to expand their power around the world - that's the point, and they were more less successful as we can see today
- Africa and Asia wanted to become part of the European empire - I don't think so, I would stay as far as possible from Europe at that time
I believe the answer is:
Europeans believed Christianity would make people more civilized.
Europeans wanted to expand their power around the world.
Both of these reasons come from the inherent view that their civilizations are superior compared to the other civilisations. The Europeans want the rest of the world to adopt similar standard of morality as them and along with it, put in their political and economic influence to other nations.