What is the correct process for assigning an ICD-10-CM diagnosis code

What is the correct process for assigning an ICD-10-CM diagnosis code? A. Locate the term in the Alphabetic Index and verify the code in the Tabular List B. Select the code directly from the Alphabetic Index without further review C. Use the Tabular List first and confirm the code in the Alphabetic Index D. Assign the most specific code available without reviewing instructional notes