Product "Manageengine Supportcenter" build 8008.

Current situation

3 Accounts A, B and C

Each account has multiple linked contacts

Each account has multiple requests

Desired situation:

Merge Account B and C into D

A keeps multiple linked contacts

D has merged linked contacts from B and C

2 contacts should be able to view any request done for account A and D

Requests from B and C should now be linked to D

After merge requests should still reflect the original company B or C

Question:

Is there a way to merge accounts?...and if so …how ?

Is defining B and C as subaccounts for D a better option, if so…can contacts of B and C see each other requests?

How can a contact (2 persons) be linked to more accounts?