Which sentence from the passage best states the main idea? It was a massive show of force, an unmistakable warning to anyone
who might dare oppose China's government.

The protestors lacked a single leader or cause, but among their
demands were democratic and economic reforms.

Although Tank Man may have disappeared, his courageous act of civil
disobedience lives on, captured by photographers.

Cole was quick to credit all the journalists and photographers who
covered the event, but it was his photo of Tank Man that captured the
world's attention.