I could help, if you can comment the answers given!
<span>In the 1900s, the UMWA was culturally and historically significant because it was a segregated organization. It was a separate entity and was not dependent of any other organizations. They were independent and had their own leaders. They negotiate with the coal mining companies regarding right practices and benefits for the employees. </span>
Assuming that the underlined word is chosen, the correct answer is C) past participle.
A would be - chose.
B would be - choosing.
D would be - choose/chooses.
Answer: Nothing
Explanation: I don't see what is wrong with child labour. It's normal.