What kind of custom field can Administrators create to add a column on the Item sublist of Sales Orders?

Custom Transaction Line fields are used to add columns to the sublists of transaction records. When an administrator needs to capture information specific to each item on a Sales Order (e.g., a special handling note per item), they create a Custom Transaction Line field. This field then appears as a new column on the "Items" sublist, allowing users to enter data for each line item individually. These fields are essential for tracking details that vary from one line to another within the same transaction.

A. Custom Transaction Body fields: These fields appear in the main (header) section of a transaction form and apply to the entire record, not to individual line items in a sublist.
C. Custom Item fields: These fields are part of the item record itself and store static information about the item, not data specific to its appearance on a particular transaction line.
D. Custom Transaction Item options: This is a specialized field type used for items with selectable options (e.g., size, color) and is not the general-purpose field for adding a custom column.
References:
1. NetSuite Help Center, SuiteAnswers: Custom Fields Overview. Doc ID: 9924. This document outlines the different types of custom fields. It specifies, "Custom transaction line fields can be added to the line items of transactions... These fields appear in the columns of the Items, Expenses, and other subtabs on transaction records." This directly supports option B.
2. NetSuite Help Center, SuiteAnswers: Creating Custom Transaction Line Fields. Doc ID: 10002. This guide details the process and purpose of these fields, stating, "You can create custom transaction line fields to add to the line items of transactions." It confirms that these fields are the correct type for adding columns to transaction sublists like the one on a Sales Order.
3. NetSuite Help Center, SuiteAnswers: Creating Custom Transaction Body Fields. Doc ID: 10001. This document clarifies the function of body fields: "You can create custom transaction body fields to add to the body, or main section, of transaction records." This explicitly contrasts with line fields and proves option A is incorrect for the stated requirement.