Final answer:
The 'thing' is Jonas’s ability to see the color red for the first time; this indicates Jonas's capacity to 'see beyond.' It is significant because it foreshadows his selection as the Receiver of Memory.
Step-by-step explanation:
When Jonas stood before the crowd, "the thing that happened with the apple" refers to Jonas seeing the color red for the first time. This phenomenon indicates that Jonas has the capacity to see beyond, which is the ability to see colors in a community where people typically see in shades of gray due to genetic manipulation. This significant moment foreshadows Jonas's selection as the Receiver of Memory, as it hints at his unique gift of perception which sets him apart from his peers.
Just like when he stood before the crown, the apple did change color, indicating that Jonas had a special ability. So, option A is the correct answer, 'It changes'.