National Merit Scholarship Program (CA semifinalist to finalist with a C?)

1560 SAT and 3.7 UW, 4.15 weighted. I got a C in APUSH junior second semester. I just meet the California NMSQT cutoff. The minimum unweighted GPA I have had in a semester was 3.5 and have taken all STEM AP options and also 5 dual enrollment courses with all As except 1 P. Will I be rejected from National Merit semi finalist to finalist? Anybody with a single C rejected?

Review Requirements and Instructions for Semifinalists in the National Merit® Scholarship Program carefully.

Roughly 95% of Semifinalists successfully advance to Finalist standing (about 15,000 out of 16,000 students). Unless your high school official decides to revoke their endorsement, I think you’re safe.