Option C, 'But those in power still do not believe that,' best supports the inference of Diane Rodriguez's ongoing frustration about being denied opportunities.
The best statement that supports the inference that Diane Rodriguez is still frustrated about being denied opportunities is option C: 'But those in power still do not believe that.' This statement indicates ongoing frustration and the lack of progress in gaining opportunities despite efforts.
Option A talks about dark times but does not directly address personal frustration. Option B mentions efforts to open doors but does not specifically convey current frustration. Option D shifts the focus to playing characters, diverting from the theme of denial of opportunities.
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