Which of the following statements are presenting research objective?

A、Therefore the objective of the study is to investigate the effect of the most commonly used GM crops on the birth rate, mortality and weight gain of rat pups.;

B、This article is aimed at presenting the possibilities of developing language skills with the use of multimedia, and particularly Internet.;

C、This research aims to identify application level of motivational strategies used at both government and private secondary schools at Turkish Republic of Northern Cyprus and offer necessary recommendations.;

D、The purpose of the research is to investigate the experiences and views of university graduates in their first year in the workplace.