Answer:
The correct answer is on the contrary.
If something is contrary, it means that it is the opposite, completely different from something else. If you want to show a contrasting (opposing, different) thought, then you can use the phrase on the contrary. You can state one thing, add on the contrary, and then explain something completely differen
Explanation:
The answer is:
B.
She couldn't remember which suitcase was yours.
Couldn't has its apostrophe between the "n" and the "t", and yours is used properly.
A vassal pledges his life t a lord and in return has to give the lord land whenever he pleases.
Safe is the best option but it could also be wary or even rash as well but it's more likely to be safe and if that's not the correct word choice then it's a safe bet wary is the correct possible alternative hope this helps you out!