When Do They Travel ???

[BillyMac]

A5 and A6 simultaneously come down with a rebound, both holding the ball, with all four feet stationary on the floor.

While both are holding the ball, what can they legally do without traveling?

1) A5 and A6 simultaneously come down with a rebound, both holding the ball, with all four feet stationary on the floor?

2) A5 and A6 simultaneously come down with a rebound, both holding the ball. A5 keeps both feet stationary, and A6 sets a pivot foot that remains stationary while moving the other nonpivot foot?

3) A5 and A6 simultaneously come down with a rebound, both holding the ball. A6 keeps both feet stationary, and A5 sets a pivot foot that remains stationary while moving the other nonpivot foot?

4) A5 and A6 simultaneously come down with a rebound, both holding the ball. A5 sets a pivot foot that remains stationary while moving the other nonpivot foot while A6 simultaneously sets a pivot foot that remains stationary while moving the other nonpivot foot (e.g., both set pivot feet and both move the nonpivot feet)?

If any of these are travel violations, citations please.