A Lead System Architect (LSA) plays a significant role at every level of data modeling...

 Data Analysts and Data Architects:

They perform data collection and design, choose the correct layer for elements, and create a logical group of elements using inheritance or composition.

This aligns with best practices in data model design where specialized roles handle the technical aspects of data modeling.

 Subject Matter Experts (SMEs):

SMEs identify data sources, understand the flow of data, and determine the proper data type for data elements.

Their expertise in the business domain ensures that the data model accurately reflects business requirements and processes.

 References:

Pega Lead System Architect documentation on roles in data modeling emphasizes collaboration between various stakeholders, including Data Analysts, Data Architects, and SMEs.

 Therefore, the correct answers are:

C. Data Analysts and Data Architects perform data collection, data design, choose the correct layer for elements, and create a logical group of elements by using inheritance or composition.

D. Subject Matter Experts identify the data source, understand the flow of data, and identify the proper data type for the data elements.