Blackboard architecture, also known as the blackboard system, is a problem - solving approach that utilizes a modular and （decentralized）framework. It effectively solves complex problems that （lack）a well - defined algorithm or a pre - determined architecture. Blackboard architecture is inspired by human experts collaborating and solving difficult problems by （sharing information）and contributing their expertise. The architecture is based on how people work together around a （blackboard）each person would sit around the board and a problem would be written on it. When a person can solve the problem, they would go to the board and add the （partial）solution they know how to do.
黑板架构是一种采用模块化分散式框架的问题解决方法，专门适配缺乏明确算法或预定架构的复杂问题。它的设计灵感源于人类专家的协作模式：不同领域专家通过共享信息、贡献专业知识来联合攻克难题，架构本身模拟了人们围坐黑板协作的场景——以“黑板”作为共享数据交互平台，各参与主体围绕它补充自身所掌握的部分解决方案，逐步推进问题的完整解决。这种架构最大的优势在于无需预设固定执行流程，能灵活整合多领域专业能力，因此常被应用于人工智能、复杂工程诊断、跨模态信息识别等不确定性高、信息分散的复杂任务场景中，有效处理传统结构化方法难以应对的问题。
该完形填空主要围绕 "黑板架构（Blackboard architecture）" 展开，介绍其概念、应用场景、灵感来源以及工作方式。
语境定位：原句为 “Blackboard architecture, also known as the blackboard system, is a problem - solving approach that utilizes a modular and ____ framework.”。空前 approach that utilizes a modular and；空后 framework 是判断本空的关键。
答案判断：上下文强调的专业概念是“分散式/去中心化的，强调多个模块或知识源协同解决问题”，该词能把前后语义自然衔接起来。因此应选 decentralized。
选项辨析：
A. centralized："centralized" 意思是集中的。
B. integrated："integrated" 意为综合的、整合的。
C. decentralized："decentralized" 表示分散的，符合语境。
D. unified："unified" 意思是统一的。
因此，选项 C 正确。