Select the best example of a student who is driven by intrinsic motivation to get an A in science class.

Raj receives money from his aunt when he has an A on his report card for any class.
Maria feels proud of herself when she works hard and gets good grades in her classes.
Cedric wants to get an A in the class so he can be chosen as a peer tutor for science.
Portia wants to get an A to raise her overall grade point average before applying to colleges.

Read this excerpt from wheels of change by sue macy. that said, it's hard to grasp the full extent of the bicycle's impact on americans in the late 19th century—particularly female americans. imagine a population imprisoned by their very clothing; the stiff corsets, heavy skirts, and voluminous petticoats that made it difficult to take a deep breath, let alone exercise. add to that the laws and social conventions that cemented a man's place as head of the household and holder of the purse strings. how suffocated women must have felt. and how liberated they must have been as they pedaled their wheels toward new horizons. what is the central idea of the excerpt