Match the parts of sentences given in Column I and Column II to form meaningful and grammatically correct complete sentences.

COLUMN I	COLUMN II
A. Irregular sleep schedules among teenagers during school weeks	D. was introduced as a ceremonial tradition in ancient kingdoms
B. Staying awake late to complete unfinished assignments	E. often affect alertness, mood stability, and academic engagement
C. Reduced sleep duration over extended periods	F. plays a decisive role in shaping coastal trade routes

The correct option is A–E only.

Let us analyze the pairs by connecting the clauses in Column I with Column II to check for semantic clarity and grammatical correctness:

1. Part A with Part E:
"Irregular sleep schedules among teenagers during school weeks" (Subject: plural noun phrase 'Irregular sleep schedules') matches with "often affect alertness, mood stability, and academic engagement" (Predicate starting with plural verb 'affect').
This forms a coherent, logical, and grammatically correct sentence: "Irregular sleep schedules among teenagers during school weeks often affect alertness, mood stability, and academic engagement."
Therefore, A–E is a valid combination.

2. Part B with other options:
"Staying awake late to complete unfinished assignments" (Gerund subject, singular context) does not logically connect with D ("was introduced as a ceremonial tradition..."), E (requires singular verb 'affects', but E has 'affect'), or F ("plays a decisive role in shaping coastal trade routes"). None of these form a meaningful connection.

3. Part C with other options:
"Reduced sleep duration over extended periods" does not make sense with F ("plays a decisive role in shaping coastal trade routes"), as sleep duration has no relation to coastal trade routes.

Hence, only the combination A–E forms a meaningful and grammatically correct sentence.