Which of the following contains a vague pronoun reference?
A. When Zoe researched Dachshunds, it said that they can be short-haired, wire-haired, or long-haired.
B. When Zoe researched Dachshunds, the breed standard said that they can be short-haired, wire-haired, or long-haired.
Identify the correct choice from the options below and respond with the letter of the correct option.

A