In September 2001, terrorists attacked which of the following places in America?

World Trade Centre

The correct answer is Option 4 - World Trade Centre

The classic cases of terrorism involve hijacking planes or planting bombs in trains, cafes, markets and other crowded places. Since 11 September 2001 when terrorists attacked the World Trade Centre in America, other governments and public have paid more attention to terrorism, though terrorism itself is not new. In the past, most of the terror attacks have occurred in the Middle East, Europe, Latin America and South Asia.