Consider four survivors on an island. 
Which of the following pairs of survivors has a double-coincidence of wants?
Definitions:
Prejudices
Preconceived opinions or judgments about individuals or groups, often based on stereotypes and without factual justification.
Physical Disabilities
Conditions that substantially limit one or more of an individual's major life activities due to physical impairments.
Americans With Disabilities Act
U.S. legislation passed in 1990 aimed at prohibiting discrimination and ensuring equal opportunity for individuals with disabilities in employment, public accommodations, and other areas.
Race
A social construct used to categorize humans into large and distinct populations or groups by heritable physical, social, and cultural traits.
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