Disable partitioning while upgrading Oracle 11.2 to Oracle 12c

Hello

I noticed while upgrading oracle 11.2 to oracle 12c,we are no more provided an option to disable partitioning while upgrading to Oracle 12c using DBUA

1. Is that correct ? Or there is a way to disable the partitioning  while upgrading oracle to 12c using DBUA ?

2. Also as per one of the notes,it says partitioning is necessary for BI systems, so do we need to have partitioning while upgrading oracle to 12c on

ECC6 EHP7

CRM7 EHP3

SOLUTION MANAGER 7.1 SPS14

Thanks

Shradha