Which Would Likely Lead to Stereotype Threat

Which would likely lead to stereotype threat?

A) Tell women taking a flower arranging test there are no gender differences in test performance.
B) Show TV ads of women in nontraditional roles before a word problem test.
C) Tell white male college students that Asians tend to do better than whites in math before a difficult math test.
D) Give women math tests in all-female groups rather than mixed-sex groups.