Question: What is the result of performing a \'decrease key\' operation in a min-heap?

Options:

1. The key is increased
2. The key is decreased and the heap property is maintained
3. The key is removed
4. The heap is destroyed

Correct Answer: The key is decreased and the heap property is maintained

Solution:

The \'decrease key\' operation reduces the value of a key and may require re-heapifying to maintain the heap property.