Organizational structure specifies the firm's $\_$

O a$.$ control mechanisms, grievance procedures, reporting relationships, procedures, and authority over decision$-$making processes.

O b$.$ formal reporting relationships, procedures, controls, and authority and decision$-$making processes.

O c$.$ formal value proposition, the markets it will serve, and how the firm will provide value in those markets.

$$ d$.$ informal reporting relationships, procedures, controls, and authority and decision$-$making processes.