Status of h4 ead after primary h1 transfer

[hectar]

Iam currently working for employer A from 9 years, I have my labor and I-140 approved 5 years back with employer A. 

My dependent is currently working on h4 ead which is approved based on I-140 petition from employer A.

if i switch to employer B from A

1. What happens to I-140 petition approved for employer A?

2. Can my dependent still continue working while employer B is applying fir new labor and I-140 for me?

3.does her work authorisation (h4 ead) remain intact through out this process ?

[User099]

1. Emp A can keep it active or withdraw it, its upto him.

2. Yes

3. Yes