The correct answer is:
<span>B. Are my grandparents coming to the party today?
</span>
To correct answer choice A, it would be:
<span>Have the children gotten out of bed yet?
</span>
To correct answer choice C, it would be:
<span>Does Carrie need a ride to the volleyball game?</span>
The rightful answer <span>There is natural beauty in a city environment.</span>
You can use the (Unique) constraint to compare one column against another column. Hope I got it right.