What is the way to measure a wavelength

The answer is D. Use multiple record types, page layouts, and profiles

Explanation:

Universal container sales reps can modify fields on an opportunity until it is closed. Only the sales operations team can modify the post close follow up date and post close followup comments fields. How to make this happen

A. Use field-level security on page layouts to restrict editing fields

B. Use field-level security to mark fields as read=only on the sales profile

C. use record types with field sets and restrict editing fields using field-level security

D. Use multiple record types, page layouts, and profiles