Which of these is the best definition for project management?

A set of activities that is performed based on knowledge, skills, tools and equipment to ensure the timely and successful completion of a project requirement.

Applications facilitate the process of meeting specific scope, time, cost, and quality goals of projects

A new system to increase sales, employee productivity, and monitors customer services is designed for companies. The systems will work on laptops, smartphones, and tablet

Projects that can range in size, from large too small.