Cultural and language knowledge in international business environment

How would you define this phrase - cultural knowledge?

  1. Don’t know
  2. Familiarity and being familiar with other cultures, that said - culture's beliefs, values, social norms.
  3. Understanding and adopting variable such as acts, attitudes, norms and believes which are the key elements of communication ability.
  4. Ability to awareness of cultural norms and attitude
  5. Crossing over into unknown areas with knowledge of how, when, why.