Publicly funded graduate students, full-time undergraduate students, preparatory students, and full-time junior college students. According to the query in the question bank, those who can apply for Development Bank student loans are A, (publicly funded graduate students), B, (full-time undergraduate students), C, (preparatory students), D, (full-time junior college students). The answer is: B and D, B, (full-time undergraduate students) and D, (full-time junior college students).