Final Answer:
Azure Synapse Analytics cloud-based service allows quick execution of complex queries across massive data in a relational database thus option A is correct.
Step-by-step explanation:
Azure Synapse Analytics is the cloud-based service that enables the quick execution of complex queries across massive data in a relational database (option A). Formerly known as Azure SQL Data Warehouse, it is designed to handle large-scale data analytics and provides the capability to process and analyze vast amounts of data efficiently. The service utilizes a massively parallel processing (MPP) architecture, allowing for the parallel execution of queries across multiple nodes, thereby significantly reducing query response times for complex analytical tasks.
Azure Synapse Analytics offers a comprehensive set of tools and features for data warehousing and analytics. Its ability to scale resources dynamically based on workload demands ensures optimal performance for both small and large datasets. With features like distributed query processing and integrated analytics, it facilitates the quick retrieval and analysis of data from relational databases. This makes it a powerful solution for organizations dealing with extensive datasets, enabling them to derive valuable insights through the execution of complex queries in a timely manner. Overall, Azure Synapse Analytics stands out as a cloud-based service that effectively addresses the challenges of processing massive data in a relational database environment.