What statue did Trump suggest to "take down" that has been used as a protest symbol since 1981?

The correct answer pertains to the "peace vigil," which is a symbolic act that began in 1981. This vigil has been a notable and lasting form of protest, often associated with various movements advocating for peace and social justice. It demonstrates the interplay between public art, memorials, and activism over time. Trump's suggestion to "take down" such a symbol reflects ongoing dialogues about which symbols and monuments are honored or criticized in public spaces, particularly in the context of their historical significance and the sentiments they evoke in modern society.

In contrast, the other options—such as the Statue of Liberty, the Abraham Lincoln statue, and the Martin Luther King Jr. statue—are widely recognized as significant national symbols associated with freedom, equality, and civil rights. They have not been focal points for protest movements in the same way, making the peace vigil a more fitting answer to the question about a protest symbol.