Which of the Following Dissolve a Partnership by Operation of Law

Which of the following dissolve a partnership by operation of law?

A) Death of a partner.
B) The partnership's engagement in an activity that suddenly becomes illegal.
C) A partner's engagement in any other business activity.
D) Death of a partner, the partnership's engagement in an activity that suddenly becomes illegal, and a partner's engagement in any other business activity.
E) Death of a partner and the partnership's engagement in an activity that suddenly becomes illegal, but not a partner's engagement in any other business activity.