Rumors about f(x) situation

F(x) cameback with "Red Light" on July 02, but in the middle of promotions Sulli just disappeared. SM said that she has been sick but f(x) also has canceled their schedules for the month. Some of the rumors are:

(1)

 Sulli is pregnant. 

(2)

Sulli is really sick.

(3)

(4)

SM is making room for their new groups. 

(5)

F(x) will disband

What do you think?