Correct Answer
with
Rule:<br />
The adjective βhappyβ is usually followed by the preposition βwithβ or βaboutβ, depending on the context:<br />
happy with β satisfaction with something received/experienced.<br />
happy about β pleasure concerning a situation or news.<br />
Explanation: <br />
Happy with means pleased or satisfied by something.<br />
eg:<br />
She is happy with her exam results.<br />
They were happy with the hotel service.