Question 17 (Mandatory) (1 point) Why is it necessary to regularly adjust a businesses marketing plan? The more the competition adjusts to match a marketing plan's approach, the easier it is to execute the marketing plan's strategies. b) The more successful the plan is the longer a business can take to adjust to the market. Oc) The more successful the plan is, the more it requires significant revision. Question 25 (Mandatory) (1 point) What are examples of the most common quantitative marketing research? a) experimental research and surveys b) focus groups and in-depth interviews c) observation and social monitoring Question 26 (Mandatory) (1 point) If an organization desires to conduct research with more active control over who participates and has a large budget to pay for research, which combination of research methods would best suit its situation? a) in-person research and mail research b) telephone and in-person research c) mail and online research