Shared task divisioning is encouraged at

linear structure
vertical structure
horizontal structure
compound structure

The correct answer is C. horizontal structure.

A horizontal structure is a type of organizational structure in which employees are grouped by function or department. This type of structure is often used in large organizations with multiple departments, such as marketing, sales, and finance.

Shared task divisioning is encouraged in a horizontal structure because it allows employees to work together on common goals. This can lead to increased efficiency and productivity.

A linear structure is a type of organizational structure in which employees are grouped by level of authority. This type of structure is often used in small organizations with a single owner or manager.

A vertical structure is a type of organizational structure in which employees are grouped by level of expertise. This type of structure is often used in organizations with a complex product or service.

A compound structure is a type of organizational structure that combines elements of both a linear and a vertical structure. This type of structure is often used in large organizations with multiple departments and a complex product or service.

In conclusion, the correct answer is C. horizontal structure. Shared task divisioning is encouraged in a horizontal structure because it allows employees to work together on common goals. This can lead to increased efficiency and productivity.