Answer:
Thromise.
Step-by-step explanation:
The word 'thromise' is a combination of two words, threat, and promise. A statement can be said as a thromise which may sound like a promise but serves as a threat.
In the given case, the statement of Kat's boss is an example of thromise. It is because his statement consists of both promise and threat. Though it may look like he is promising to give extra payment for the work but there's a threat as well of not being able to get flexible hours of working.
Thus, the correct answer is thromise.