Concept:The sentence needs a word that matches the lively, nonstop nature of the uncles’ marathon conversations.
Explanation:“Animation” suggests liveliness and energy.
The paired word should also describe talkative, fluent speech.
“Volubility” means the quality of talking fluently and at length.
“Reticency” means keeping silent or reserved, which is the opposite.
“Incompetency” and “impotency” are unrelated to conversation.
Answer:The correct answer is B. Volubility.