Final answer:
Mary Jackson aimed to ensure that African American girls would not restrict themselves due to race or gender, and she did work at Langley Laboratory, becoming part of the community there.
Step-by-step explanation:
The true statement about Mary Jackson is that she wanted to make sure that young African American girls did not put limits on themselves because of their race or gender. Mary Jackson was a mathematician and aerospace engineer who made significant contributions to the National Advisory Committee for Aeronautics (NACA), which later became NASA. She, alongside her colleagues Katherine Johnson and Dorothy Vaughan, was one of the pioneering African American women at NASA whose story was highlighted in the book and film Hidden Figures. Jackson moved to Hampton, Virginia, to work at Langley Laboratory, which is a factual statement about her life, and she indeed became part of the community there.
Additionally, while there was segregation and inequality present during that time, there is no evidence that Jackson initially refused to work at NACA because African Americans were forced to work in a segregated area. Furthermore, her career was driven by the goal to inspire and open doors for future generations of African American women in STEM fields.