Answer: C. QuickBooks Online Advanced
Explanation:
With the QuickBooks Online Advanced, Johanna can be bake to do batch transactions faster even when there's an increase in workload. In the QBO Advanced, there are batch transaction entry for sales, checks, receipts, invoices, etc.
Since Johanna wants to be able to set up specific roles for the 15 different users in her company, including providing access to her CPA, outsourced CFO, and an outside integration specialist and ProAdvisor, the version of Quickbooks Online that would allow her to accomplish this is the QuickBooks Online Advanced.