According to the Jobs-to-be-Done theory, there are different types of buyers. Which of the following represents these types? Select all that apply. Select one or more: a. The job executorsomeone who uses the product to complete the core functional job. b. The product lifecycle support team people from various groups who support the product during its lifecycle. c. The buyerthe person who is responsible for financial purchase decisions. d. The supporterspeople who identify the need for the job and promote solutions to the buyer