A
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
In 1987, a supernova was detected in the Large Magellanic Cloud galaxy, which is approximately 169,000 light years from Earth. Which event produces a supernova?

### Choices:
A. the explosion of a massive star
B. the birth of a main-sequence star
C. the collapse of a medium-sized star
D. the collision of one star with another

### Answer:
