cares about her children's concerns and is an independent thinker
The reader can infer that Gerry wanted to reassure her children, and herself, that she was still capable of driving. She took the initiative to use a local resource, which implies independent thinking. There is not enough evidence in the passage to support the other options.
B wanted the people at the community center to decide if she could drive because she was afraid
C wants to be labeled disabled so she can get further treatments for balance issues
D wants to disregard whatever her children think and do what she wants to do