What happened because Katherine Johnson checked a flight path for John Glenn?
A
John Glenn was able to complete his mission
safely.
B
John Glenn stopped trusting the IBM
computer.
С
John Glenn decided to become an astronaut.
D
John Glenn helped her get a job with NASA.

A . John Glenn was able to complete his mission  safely.

Explanation:

John Glenn was the astronaut who would become the first American to orbit the earth. This event in history was later made into an award-winning historical film called "Hidden Figures", starring Taraji P. Henson, Janelle Monáe, and Octavia Spencer as the main characters.

The movie focuses on how human computers were used to calculate the math behind one of the most important events in space history for the United States. Moreover, it also reveals how three black women, or "women of color" were responsible for the success of the space mission.

And in asking to "get the girl (Katherine Johnson) to check the numbers", John Glenn was able to safely orbit in space and return to earth.

Thus, the correct answer is option A.