visiting visa for sisters

[ralr06]

My parents have visa appt in Jan 07.
I have two sisters back home who will be willing to visit too for a month along with my parents. Will they be able to get the visitor's visa.
One is working and other is studying, will they consider as potential immigrants to be rejected?

Please respond.

Thanks,
LR

[immihelp]

It is difficult for young persons to get visitor visa who don't strong ties to the home country.