Select the most appropriate meaning of the given idiom.

Upset the apple-cart

Spoil careful plans

The most appropriate meaning of the idiom "upset the apple-cart" is to spoil careful plans. It means to disrupt or destroy something that has been carefully planned.

The other options are not as appropriate.

• Withdraw means to remove oneself from a situation.
• Consider unsatisfactory means to think that something is not good enough.
• To be offended means to feel hurt or angry because of something someone has said or done.