The error "Object reference not set to an instance of an object" occurs because dtReports has not been initialized before use.

To fix this, the correct approach is to initialize the DataTable before adding rows, using:

dtReports = New System.Data.DataTable

Explanation of Each Option:

A (Assign dtReports = New System.Data.DataTable) ✅ (Correct Answer)

Initializes a new empty DataTable, which is required before adding rows.

Once initialized, dtReports can hold columns and rows.

B (Assign New System.Data.DataTable = dtReports) ❌ (Incorrect)

Incorrect syntax. New System.Data.DataTable must be assigned to a variable, not the other way around.

C (Assign dtReports = New System.Data.DataRow) ❌ (Incorrect)

DataRow represents a single row, not the entire DataTable.

We need to initialize the table first, not just a row.

D (Assign dtReports = New List(Of DataRow)) ❌ (Incorrect)

A List(Of DataRow) is not a DataTable. UiPath's Add Data Row activity only works with DataTable, not with lists.