Explanation:

- Upset the apple-cart: This idiom generally means to disrupt or spoil someone's carefully laid plans.

- Option 1 - Withdraw: This means to remove or take back, often not related to disrupting plans.

- Option 2 - Spoil careful plans: This aligns perfectly with the idiom, as it involves interrupting or ruining something organized.

- Option 3 - Consider unsatisfactory: This means to think something is not good enough, which isn't the meaning of the idiom.

- Option 4 - To be offended: This refers to feeling insulted or annoyed, unrelated to ruining plans.

Correct Answer: Option 2 - Spoil careful plans