Answer:
A. In 1863, a riot erupted in opposition to a draft for the ongoing Civil
War.
Step-by-step explanation:
The word "riot" in itself means a violent outburst by a group of people who wants to shows their dissension and dissatisfaction by actions of violence and mutiny, disturbing the peace and quiet of the atmosphere. So, for the right connotation of the word "riot" among the four given sentences, the right answer will be
A. In 1863, a riot erupted in opposition to a draft for the ongoing Civil
War.
Here, 'riot' is followed by the word "erupted", correctly signifying the disturbance and outburst of the people.