I think that the underlined pronoun is "them", correct?
"them" is not a possessive (this would be "their") nor is it nominative (this would be "they").
So it must be objective; and it is in fact the direct object!
The answer is D. When he enlightened his father regarding his choice of joining the Army, his dad tragic "NO". Both Carter Druse and his dad left the table that morning with broken hearts. What's more, Carter soon left his home, and everybody he wanted to wear the blue uniform of the Union trooper.