What can NOT be inferred from the letter?A.Selvac model 12 is a poor-quality product.B.Mar

What can NOT be inferred from the letter？

A.Selvac model 12 is a poor-quality product.

B.Martha Simmons expects a quick response.

C.Martha Simmons used to work for Selvac.

D.Selvac advertises its products on television.

请帮忙给出正确答案和分析，谢谢！