The correct answer is False.
It is false that the largest one week drop of the Dow Jones occurred the week the Dow Jones reopened after 9/11.
On October 10, 2008, The Dow Jones fell 697 points and generated so much panic among the investors. Those were times of economic conflicts after the global market meltdown. Over the week, the Dow Jones fell almost 1,874 points or 18%, which meant its worst week ever in percentage and in points. So that is why it is false that the largest one week drop of the Dow Jones occurred the week the Dow Jones reopened after 9/11.
