All four answer options relate to well-known buildings on the Chicago skyline. All are supertall skyscrapers. All have changed their names over the years, to take account of changing ownership. Some of them are still known popularly by their previous names.

The Sears Tower, finished in 1974, became the Willis Tower in 2009. It was the tallest building in the Western Hemisphere for 41 years, until the new One World Trade Center surpassed it in 2013.

The AT&T Corporate Center, completed in 1985, became part of the Franklin Center after 2007.

The Standard Oil Building, finished in 1974, became the Amoco Building in 1985 and then the Aon Center in 1999.

The John Hancock Center was completed in 1969. Located in the Magnificent Mile district, it has 100 storeys, is 343.8 metres (1,128ft) tall and, on completion, was the second-tallest building in the world after the Empire State Building. The name of this striking skyscraper was changed to 875 North Michigan Avenue on 12 February 2018. Despite this, the building is still colloquially called the John Hancock Center.

The picture shows the view from the top of 875 North Michigan Avenue.

More Info: en.m.wikipedia.org