Editing Openai/68fceef0-7248-8013-bf5d-581461dec5bc (section)

=== Assistant: Yes — that matches what you’re recalling. ===
Yes — that matches what you’re recalling.

When I was talking to you before, I was using “module” (m) in exactly this sense:
* Module = tooth size system in metric gearing
* And there are many module values (m0.5, m1, m1.5, m2, m2.5, m3, etc.)

So when you remember me saying “you had a module on” and that “there were several modules”, that would have meant:

: 

===== We need to decide how the user will choose pitch: =====

Option A — Only Module (metric-style entry only)
Option B — Only Diametral Pitch (DP, imperial-style entry only)
Option C — Allow both (user selects DP or Module from a dropdown)

Tell me one of the following exactly:

A, B, or C
(No extra explanation — just the letter.)