Comprehensive and Detailed Explanation From Exact Extract:

In Oracle Utilities Customer to Meter,bill segment calculation linesdetail how a bill segment’s amount is calculated based on the rate calculation rules. Multiple calculation lines can be generated when there are changes in the rate structure during a billing period that affect proration. The Oracle Utilities Customer to Meter Configuration Guide specifies thata change in the proratable rate version calculation group for a rate schedule and a proratable bill factor value in the rate version calculation group during a billing period(Option D) can cause multiple bill segment calculation lines. This occurs because the system must prorate the charges for different periods within the billing cycle, creating separate lines for each applicable rate or bill factor.

The other options are incorrect:

Option A: A change in the rate schedule itself is not typically proratable within a single billing period; it would result in a new bill segment, not multiple calculation lines.

Option B: Multiple calculation lines can be produced, so this is incorrect.

Option C: A change in the bill factor value alone may not necessitate multiple lines unless combined with a rate version change.

Option E: A change in the rate version calculation group alone is insufficient without the additional impact of a proratable bill factor change.

Thus, the correct answer isD, as it accurately describes the conditions leading to multiple calculation lines.