Solution:Todd Kachru's Three Circles of English observes that English speaking countries are separated into three groups : the Inner Circle, the Outer Circle, and the Expanding Circle. These circles represent the patterns of acquisition and the functional domains in which English is used across cultures and languages.
• Inner circle represents native English speakers: USA, UK, Canada, Australia, New Zealand.
• Outer circle represents the countries which are colonized by Britain and English language has a fair share in official works (in offices) as: India, Pakistan, Bangladesh, Kenya, Sri Lanka, Singapore etc..
• Expanding circle represents the countries which use their native language for official purpose but they learn and use English language for corporate relates works /business and for foreign communication. They are: China, Japan, Nepal, North & South Korea, Israel, Taiwan etc..
Thus, option (c) will be correct answer.