The admission of Alabama as a slave state was the main point of controversy that led to the Missouri Compromise. After Alabama wanted to be part of the Union by being a slave state, the number of free state to slave state became equal to 11. This angered the free states and the members of the Congress that were in favor of slavery free states. The only way to stop the coming civil war was the Missouri Compromise. If Missouri was admitted as the slave state then the balance of equality would tilt towards the slave states and this would result in a big clash. To stop this from happening, the Missouri Compromise was the middle path that was chosen.
The grocer didn't notice the thieves enter until it was too late.
If you were playing the piano how did the vase get broken.
The police force still had no idea how they were going to enter the strange cottage without being seen.
It means paying attention to good behavior or actions.
Answer: act as a single unified sentence
Explanation: I suspect this is the answer, because usually it would be like a list. And the list wouldn’t usually be separated in different sentences