Select the most appropriate meaning of the given idiom.

A bull in a China shop

An extremely awkward, clumsy person

The most appropriate meaning of the idiom "a bull in a china shop" is an extremely awkward, clumsy person. 

The idiom is derived from the image of a bull running through a china shop, knocking over and breaking all of the delicate china. It is used to describe someone who is clumsy and careless, and who is likely to cause damage to things around them.

The other options are not as appropriate meanings for the idiom "a bull in a china shop":

• A very disciplined and systematic person: This is not the meaning of the idiom.
• A brave person in a group of cowards: This is not the meaning of the idiom.
• To be a rude and aggressive person: While some people may use the idiom to describe someone who is rude and aggressive in a clumsy or careless way, this is not the most common meaning of the idiom.