Answer:Telling style leadership
Explanation: According to Hersey and Blanchard’s situational model of leadership, The telling style is an authoritarian type of leadership ususally directed or used with low- maturity followers where the leader gives explicit directions and instructions on how tasks should be performed and orders are not subject to interpretation
This type of leadership usually occurs when the leader has an expertise in the area which he or she specializes and so gives clear, precise quick and controlled instructions for efficient implementation.
Here, Sandra uses the Telling style leadership to accomplish tasks and performances.