A. Add "Retail Sales" and "Business Sales" categories to the contact form, and set up a Recipients list for each category

B. Add a new contact form for Commercial Sales inquiries, and update the Recipients list for each form to send submissions to the right people.

C. Since there is only one Contact form, create a Content type with fields to collect the information Commercial Sales needs, and set permissions to allow anonymous users to create content

D. Use an add-on module like Webform. since Core doesn't offer this feature