Answer:
They can work for pay, and they can fight in the Union army.
The correct answer is <em>vain</em>.
A vain person is a person who is too pleased with themselves, and <em>vain</em> and <em>conceited</em> are synonyms (words which have the same meaning and can be used interchangeably).
Modest, which means, not proud, or believing that one isn't important, is synonymous with humble and these two words can also be used interchangeably.
Hello I hope your having a nice day. The answer to your question is Contrast.