What best describes the characteristic features of ataxia?

A: Ataxia refers to an involuntary, repetitive, and purposeless movement disorder.

B: Ataxia typically involves uncoordinated and jerky movements, affecting balance and coordination.

C: Ataxia is characterized by the loss of muscle tone and flaccidity in affected limbs.

D: Ataxia primarily leads to excessive and involuntary muscle contractions and rigidity.

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