Answer:
The step that completes the process for adding all of these transactions to the bank feed at the same time is:
D. Update.
Explanation:
Applying the 'update' option will ensure that all transactions are processed immediately without issuing separate instructions. 'Update' brings the records to the latest correct version, which also takes into account all considerations and events. It can add or subtract gas transaction data, taking in the latest and all available transactions.