a. individuals who were not born in the United States and whose native language is a language other than English; or
b. individuals who come from home environments where a language other than English is spoken in the home; or
c. individuals who are American Indian or Alaskan natives and who come from environments where a language other than English has had a significant impact on their level of English language proficiency; and
d. individuals who, by reason thereof, have sufficient difficulty speaking, reading, writing, or listening to the English language to deny such individuals the opportunity to learn successfully in classrooms where the language