What is the most common selection criteria used by u. s. firms when choosing an employee for an overseas assignment?

The most common criteria when choosing an employee for an overseas assignment is:
1. Competency in employee's area of expertise
2. Ability to communicate verbally/nonverbal,y in the foreign country
3. Flexibility, tolerance of ambiguity, and sensitivity to cultural differences
4. Motivation to succeed and enjoyment of challenges
5. Willingness to learn about the foreign country's culture/language/customs
6. Support from family (most influential factor)

Where are the options