Select the conclusion that best follows from the statements given below.
Statements:
In a university, some students can speak English and German, but not French.
Some students can speak French and Japanese, but not Korean.
Some students can speak German and Korean, but not Japanese.
Some students can speak English and Japanese, but not Korean.
Conclusions:
I. All students who speak Japanese can speak English.
II. Among the students who speak German, some can speak English and some can speak Korean.
III. Students who speak French can speak German as well.