Help its hard

The fresco is a dynamic work because, by capturing the energy, humanity, and collective achievement of the Detroit workers, celebrates all working men and women.

NO CHANGE
that,
while
that was,

the answer would be "that,"

Explanation:

This is appropriate for the statement as it joins the two parts of the sentence meaningfully and in proper structure.

onto a large boat, and mark the water level that the boat sinks to. then, take the elephant out and put a bunch of marked weights onto the boat until it reaches the same water level. add up the masses of the weights to get the weight of the elephant.

b. cronkite, a trusted television personality, declared that the war was unwinnable and told the american people that the government had better find a way out

even though it went against everything the news anchors typically stood for, cronkite voiced an opinion and took a stance, telling the us that there was no way they were going to win, the war was going to end in a stalemate.