The usage of at is the error
Explanation:
IN is for large spaces that can enclose (village, city, state, province, country, continent, mountain range, desert, zone, etc.)
ON is for surfaces.( street/avenue/road, most bodies of water, etc)
AT is for points ( We live at an address, at a certain point and at a certain person’s residence if just the possessive case is used to mean the residence.)
Examples:
1- I live in Belgrade.
2-They live on Mulberry Street
3-I live at 199 Main Street
Conclusion: AT is a tiny point, ON is bigger, and IN is big enough to surround you.
Answer:
A cage full of rats, which is his worse fear.
Answer:
Lincoln Vows to care for those injured by the war.
Explanation:
he says, "to care for him who shall have borne the battle and for his widow and his orphan" showing that he wants to care for the injured in the war and restore peace.