Which of the Following Is an Example of Cumulative Voting

Which of the following is an example of cumulative voting?

A) Dan and Ben own ten shares together and two directors are to be elected, so they receive the right to cast 12 votes.
B) Dan owns two shares and two directors are to be elected, but he receives no rights to cast a vote.
C) Dan owns six shares and two directors are to be elected, so he receives the right to cast six votes.
D) Dan owns ten shares, and five directors are to be elected, so he receives the right to cast 50 votes.