Question: In a breach of contract action brought by a supplier against a grocery store for refusing to buy his artisanal bread and goat cheese, the supplier calls his ex-wife to testify about the business the supplier operated and the financial effect of the breach on his business and personal finances. On cross-examination she admits that she is the supplier's former spouse. Thereafter, on re-direct, the supplier's attorney seeks to have the ex-wife testify that she and the supplier have not spoken to each other since their bitter divorce proceeding threeyears ago. The ex-wife's testimony is
A: admissible under the family history exception to the hearsay rule.
B: admissible, because the ex-wife's answer might rebut the inference of bias. 
C: inadmissible, because it relates to a collateral matter. 
D: inadmissible, because it is irrelevant to any substantive issue in the case. 
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option.