Why does yahoo answers make me wait 4 hours to pick a best answer?

its kinda stupid if my question gets answered in the first 5 mins that i cant pick a best answer right away and if i already have an answer why would i come back in 4 hours just to pick a best answer.

2013-08-11T18:56:00Z

For those saying its an hour it definitely isnt my recent question was posted 2 hours ago and i still cant choose best answer.

?2013-08-11T18:27:59Z

Favorite Answer

Cause in that 4 hours someone might have a better answer.

?2013-08-12T01:37:33Z

You can choose a best answer after 1 hour and 1 answer
You can rate the answer with 1-5 stars leave a short comment and submit. The asker gets 3 points for choosing and the best answerer gets 10 points and 1 point extra for any thumbs up they have. (total to 50)
Any level can choose a best answer and vote on questions in voting.
http://help.yahoo.com/kb/index?page=content&id=SLN4196&actp=search&viewlocale=en_US&searchid=1372992024267&locale=en_US&y=PROD_ANSW

Anonymous2013-08-12T02:04:37Z

You should be able to pick BA after an hour, if not it's probably some
glitch.

Anonymous2013-08-12T01:36:30Z

You have to wait One hour NOT four and it only requires one answer. And that's because they decided on one hour.

?2013-08-12T01:27:49Z

I wondered that my self I would assume its bc there needs to be more than just one answer to choose from.