Read the following passage and answer the question.David was an aspiring entrepreneur who had always dreamed of starting his own business. He had a keen interest in technology and saw a gap in the market for innovative mobile applications. Determined to turn his dream into a reality, David spent months researching, drafting business plans, and seeking advice from experienced professionals. After conducting extensive market analysis and securing funding, David launched his mobile app startup. He and his team worked tirelessly to develop a user-friendly and scalable app that would disrupt the industry. Through strategic marketing and continuous improvement based on user feedback, David's startup quickly gained traction and became a prominent player in the market.What did David use to do continuous improvement?A lot of research and drafting of business plans.A lot of market analysis and advice from professionals.Working tirelessly to develop a user-friendly and scalable app.User feedback