Imagine that "XPatriot" is a U.S.-based company that is expanding operations in South America. When determining which employees will be selected for expatriate assignments, the company assesses candidates on four factors: 1) Ability to speak fluent Spanish; 2) Ethnicity, with preference being given to Hispanic candidates; 3) personality traits demonstrating one's ability to adjust to new cultures; 4) prior job performance within the company. When considering issues of legality and test validity, which of these four factors should XPatriot eliminate from their selection process