There is a sentence that is missing in the paragraph below. Look at the paragraph and decide where (option $1, 2, 3$, or $4$) the following sentence would best fit.
$\text{Sentence}$: Taken outside the village of Trang Bang on June $8$, $1972$, the picture captured the trauma and indiscriminate violence of a conflict that claimed, by some estimates, a million or more civilian lives.
$\text{Paragraph}$: The horrifying photograph of children fleeing a deadly napalm attack has become a defining image not only of the Vietnam War but the $20{ }^{\text {th }}$ century. $\_\_\_\_(1)\_\_\_\_$ Dark smoke billowing behind them, the young subjects' faces are painted with a mixture of terror, pain and confusion. $\_\_\_\_(2)\_\_\_\_$ . Soldiers from the South Vietnamese army's $25^{\text {th }}$ Division follow helplessly behind. $\_\_\_\_\_(3)\_\_\_\_$ . The picture was officially titled "The Terror of War," but the photo is better known by the nickname given to naked $9$-year-old at its centre "Napalm Girl". $\_\_\_\_(4)\_\_\_\_$.
- Option $1$
- Option $4$
- Option $2$
- Option $3$