Please I need 1 line explanation for each answer

13. During hisoy, (M&M) had a guest speaker every night who would deliver 15 for minutes. The number of customers really increased in order to come and listen to what he had to say. Offering these short talks is an example of: O a. a strategic plan a b. a competitive advantage O c. the mission statement c O d. the vision 14. Medro and Mariana were talking to Liliana one day about ways to increase their productivity. Liliana told them: "if you would like to double your total productivity, then one way is to decrease your total costs by half. So, for example, if your total costs are 2000 KD/month, find a way to decrease your total costs to 1000 KD/month keeping your total revenue as it currently is, and your productivity will double." a. Liliana knows what she is talking about b. Liliana does not know what she is talking about