Final answer:
The light from Procyon A observed today left the star 11 years ago, which means if we are in the year 2023, the light we are seeing left the star in 2012. The correct option is (B).
Step-by-step explanation:
Procyon A is approximately 11 light years away from Earth. The concept of a light-year is critical to understanding this measurement, as a light-year is the distance that light travels in one year, which is about 9.461 trillion kilometers (5.879 trillion miles).
The speed of light is 300,000 kilometers per second (about 186,000 miles per second), and thus the light you see from a star has traveled many years to reach us.
Given that Procyon A is 11 light years away, the light we are seeing tonight actually left the star 11 years ago. Therefore, if it's 2023 today, the light left Procyon A in the year 2012.