You need to change the schema for the temporal table you created earlier. The below is the command that is used to change the schema or drop the temporal table. Fill in the blanks with suitable words or values in the command. 
…………. TABLE dbo.CustTemporal SET(SYSTEM_VERSIONING = …………)

Answer options:

A.MODIFY, ON
B.MODIFY, OFF
C.MODIFY, NULL
D.ALTER, OFF
E.ALTER, ON
F.ALTER, NULL

Correct Answer: D 
To drop the temporal table or change the Schema, first, you must set System Versioning to OFF. 
The below is an example of the command: 

Option A is incorrect. ALTER, not MODIFY, is used to change the schema. Also, System Versioning needs to be set to OFF.Option B is incorrect. ALTER, not MODIFY, is used to change the schema.
Option C is incorrect. ALTER, not MODIFY, is used to change the schema. Also, System Versioning needs to be set to OFF.Option D is correct. ALTER and OFF are the right solution.
Option E is incorrect. System versioning needs to be set to OFF, not ON.
Option F is incorrect. System versioning needs to be set to OFF, not NULL.
Reference: 
To know more about Temporal Tables, please visit the below-given link: 

https://visualbi.com/blogs/microsoft/azure/designing-slowly-changing-dimension-scd-azure-data-factory-using-sql-server-temporal-tables/