Concept:
Assumption-based reasoning — identify what is taken for granted.
Step 1: Analyze the statement.
Flights are suspended only for the next four days due to a strike.
Step 2: Evaluate Assumption A.
Since suspension is temporary (4 days), it is implied that flights are expected to resume after that period.
Hence, Assumption A is implicit.
Step 3: Evaluate Assumption B.
The statement does not necessarily assume that the strike will be withdrawn within four days.
Flights may resume due to other arrangements as well.
Thus, Assumption B is not implicit.
Step 4: Final conclusion.
Only Assumption A is implicit.