Which country has the largest economy in the world as measured by GDP?

Global crime has only existed with legal commerce for a few decades

Indicate whether this statement is true or false.

An increasing number of researchers are conducting experiments over the Internet because of the advantages it affords. Which of the following is NOT an advantage of using the Internet to conduct and experiment?

a. ease of access to culturally diverse populations b. having access to a large sample of individuals c. a tremendous cost savings over other types of experiments d. there can be multiple submissions to the study by the same person