Austria-Hungary Ultimatum to Serbia?

Question:Here what I would like to know:
Why did Austria-Hungary only give Serbia 2 days to answer? Was it make sure the assassins didn't escape or something?

Any help is great! Thanks!

Best Answer - Chosen by Asker: Here what I would like to know:
Why did Austria-Hungary only give Serbia 2 days to answer? Was it make sure the assassins didn't escape or something?

Any help is great! Thanks!

False.
Austria was trying to find excuse to start ww1 (actally taking over all Balkan countries), which they prepared for decade before the assassination. Believe it or not Ferdinand was deliberately sacrificed, they knew very well that Sarajevo at that time was dangerous place for him. Bosnians wanted national freedom and they were reluctant to everything coming from the Empire, and Austrians took Ferdinand on a stroll in open carriage. C'mon !
The only argument you can take, and not being ridiculous , is that Empire wanted to impose their rule over Balkan, to make bigger and powerful state, with would be of economic benefit to all Balkan people. Balkan people couldn't see that at the time. You can defend your position , but saying that Austria was very insightful at the time, and that they have a vision of one big country with many nations in it, where national is not dominant, but material. That's today's EU.

Arguing that the Serbian government was implicated in the machinations of the Black Hand, the group that the assassin of Arch Duke Ferdinand, Gavrilo Princip, belonged to (whether it was or not remains unclear, but it appears unlikely), the Austro-Hungarians opted to take the opportunity to stamp its authority upon the Serbians, crushing the nationalist movement there and cementing Austria-Hungary's influence in the Balkans.
It did so by issuing an ultimatum to Serbia which, in the extent of its demand that the assassins be brought to justice effectively nullified Serbia's sovereignty.
Austria-Hungary's expectation was that Serbia would reject the remarkably severe terms of the ultimatum, thereby giving her a pretext for launching a limited war against Serbia. It only gave them 2 days to answer to limit Serbia's options even further.