Question $4$

$2\mathrm{.}22pts$

Which of the following is the best solution to increase respondent participation?

Speaking about the credibility of the organization's management

Delivering the questionnaire by mail to ensure minimum contact

Providing incentives as rewards

Telling respondents that they are the sole participants

Question $5$

$2\mathrm{.}22pts$

A marketing researcher is interested in examining the cause and effect relationship between advertising and sales increase. Which of the following is the most appropriate to address this research objective?

Personal interview

Internet survey

Experiment