Which sequence best completes the sentence below? (1)______________ this study, ...

Questão de Inglês da banca EN aplicada no concurso ESCOLA NAVAL (2008). Confira a resolução completa abaixo:

Which sequence best completes the sentence below? (1)______________ this study, John Charlton (2)__________________ the University (3)_______________ Bolton (4)_______________________ England and colleagues examined nearly 400 gamers, most of whom were male, and questioned them (5)_______________________ how much they played video games.