If a researcher offers beer drinkers an extra incentive to recruit their friends who also drink beer to participate in the study, s/he is using a(n) ________sample.

Which of the following statements is (are) true regarding the relationship between an agent and an undisclosed principal? The principal is required to indemnify the agent for any contract entered into by the agent within the scope of the agency agreement. The agent has the same actual authority as if the principal had been disclosed.

A. I only. B. II only. C. Both I and II. D. Neither I nor II.

Electronic devices automatically record behaviors that supplement a diary for media panels

Indicate whether the statement is true or false