What does "jabber" mean?

The term "jabber" means to talk rapidly and excitedly, often in a way that may not be easily understood, which aligns perfectly with the definition provided in option B. This word typically conveys a sense of animated conversation that can include a lot of noise and energy. People might jabber when they are excited, nervous, or simply trying to express themselves quickly, leading to an overwhelming or chaotic exchange of words. It does not imply a thoughtful or formal discussion, nor does it suggest writing or speaking quietly, making B the most fitting choice for the meaning of "jabber."