New York State Intelligence Center Has Created a List of Suspicious

New York State Intelligence Center has created a list of suspicious factors to consider that may indicate a possible terrorist threat.Which of the following is not one of the factors?

A) Recent travels overseas to countries that sponsor terrorism.
B) No obvious signs of employment.
C) Use of lobby or other pay phone instead of room phone.
D) Arriving in the United States without a passport or other form of identification.