Which of the following describes one of the central ideas of the text?

A
The effects of Hawking’s disease on his body have not stopped him from making discoveries that have changed the way we understand the universe.
B
Since developing ALS, Hawking has stepped back from physics to focus more on contributing to disability rights.
C
In the first few years following his diagnosis of ALS, Hawking was too disheartened by his new limitations to contribute to disability rights or physics.
D
While Hawking’s mind continues to be sharp, his disease has prevented him from communicating his ideas to others.