A tense & modal question

Hi , here is a question still being discussed in a forum in Turkey?

By the end of next July, he ------- from university and ------- working for his father's company.

A) will graduate/start
B) might graduate/starts
C) will be graduated/will start
D) may have graduated/started
E) could graduate/can start

Which one (s) would you pick as the best answer and why please ?

Thanks in advance.