Where can you navigate to enable the feature to bill customers for costs incurred during project work?

The option that specifies navigating to "Setup > Company > Enable Features > Transactions" is correct because this is the section in NetSuite where administrators can officially enable and manage various features related to billing and transactions. Enabling additional billing features allows users to assess and charge customers for costs linked to project work effectively.

This pathway provides a centralized location for enabling a range of important features that are foundational for transactions tailored to customer interactions, including the ability to bill for project expenses. By accessing the "Enable Features" section, users can ensure that the relevant billing functionalities are turned on, which is essential for accurately tracking and invoicing project-related costs.

Other options refer to more specific subsets of functionality or may not focus directly on the broader configuration necessary to allow for customer billing based on project work.