Why is strategy implementation referred to as the $$graveyard of strategy$?$

Multiple Choice

The levers that managers have at their disposal during the implementation stage of a strategy are insufficient.

The successful implementation of a strategy requires key functions in the organization to compete with each other.

It is a process that is independent of strategy formulation and is not necessary to ensure continued success.

Managers often fail to implement a chosen strategy successfully despite extensive analysis of business environments.