Manager: The only employees who should receive bonuses this year are those who were exceptionally productive over the past year.
Evidence
The only employees who should receive bonuses this year are those who were exceptionally productive over the past year.
Liang works in a division that has failed to meet its productivity goals for the year.
Conclusion
Liang should not receive a bonus this year.
Evaluate
The evidence would provide more support for this conclusion if the second premise stated that Liang failed to meet her productivity goals for the year. But we're only told that the division that Liang works in failed to meet its goals. The argument assumes that what is true of the division is also true for Liang. That's not necessarily the case.
Goal
Look for an answer that describes a Part vs. Whole flaw, an assumption that something must be true of one part (Liang) if it is true of the whole (the division).