Indicate Whether or Not the Parties in the Following Situations

Indicate whether or not the parties in the following situations are "related" for tax
purposes.
A) Mr. Grey and his sister's son, Matthew, are negotiating an economic transaction. Are Mr. Grey and Matthew related for tax purposes?
B) Mr. Field is the sole shareholder of Corporation X, and Mrs. Field, (Mr.
Field's wife) is the sole shareholder of Corporation Y. Are the two corporations related for tax purposes?
C) Sarah owns seventy percent of the shares of ABC Co. Andrew owns the
remaining thirty percent. Sarah and Andrew are not related. Is Andrew related to ABC Co.?
D) Glen owns thirty percent of the shares of Corporation A. Glen's wife also owns thirty percent of the shares of Corporation A. The remaining forty percent of the shares are owned by Steven, who is a friend of the family. Is Glen related to Corporation A for tax purposes?
E) Tammy and her brother's wife Angela are negotiating an economic transaction
Are Tammy and Angela related for tax purposes?