The best support for Diane Rodriguez's ongoing frustration is the lack of belief by those in power in paragraph 8.
The statement that best supports the inference that Diane Rodriguez is still frustrated about being denied opportunities is statement A: "But those in power still do not believe that." (paragraph 8)
This statement indicates that despite efforts or attempts made, there is still a lack of belief or recognition from those in positions of power, leading to ongoing frustration.
The constant denial of opportunities by those in authority contributes to Diane's persistent frustration and feeling of being overlooked.
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