Was the world trade center the tallestbuilding in america on 9/11

Eleven American buildings have held the title of tallest building in the world (9 in New York City). ... Prior to September 11, 2001, attacks in New York City, the twin towers of the World Trade Center occupied the second and third positions on the list below, behind Willis Tower.

List of tallest buildings in the United States - Wikipediahttps://en.wikipedia.org/wiki/List_of_tallest_buildings_in_the_United_States

Correct answer for apex is d.