Subject based on drop-down field data?

I see that a similar query was unanswered two years ago and topic was closed.

https://ww.wp.xz.cn/support/topic/plugin-custom-contact-forms-message-subject-from-drop-down-list?replies=3

I want my subject to populate with one of several choices in a drop-down menu, for example:

Choose one:
Support question
√ Sales Question
Thanks for your service

thus,Subject="Sales Question"

Didn’t see how to do this. Can you?

https://ww.wp.xz.cn/plugins/contact-form-7/