Which of These Statements Best Reflects the Guideline for Making

Which of these statements best reflects the guideline for making marketing plans controllable and flexible?

A) The firm ensures that people at all levels in the firm understand what, when, and how they are to accomplish their tasks.
B) The firm's marketing plan has all the key marketing mix factors and is supported by resources.
C) The firm's marketing plan enables results to be compared with planned targets using precise marketing metrics but the plan can be altered based on results.
D) The firm insists on ownership of the marketing plan by team members and stakeholders.
E) The firms ensures that the right person to implement plans is heavily involved in making the plans.