Answer:
B. 18
Explanation:
The child will automatically gain citizenship if he is under the age of 18.
Since 18 is the age that you become a legal adult, if the child is under the age of 18, he will gain citizenship because he is still legally under control by his parents.
<span>What were some of Lincoln's desires for the nation after the war. **A SMALL LIST/PARAGRAPH AND I WILL MARK BRAINIEST AND GIVE EXTRA POINTS**? how can you do that</span>