Answer: DBE is a late exit program while TBE is an early exit program.
Explanation:
Transitional bilingual education (TBE) and Developmental bilingual education (DBE) are subtractive, that is, bilingual programs that teach a new language in the learner’s native language .
TBE is an early-exit bilingual program which teaches the basics in the learner’s native language before switching to English. In contrast, DBE is a late-exit program, where more content is covered in the learner’s language and for a longer period before making the switch to English.