Which of the following contains a vague pronoun reference?
A. When Roxanne researched Dachshunds, it said that they can be short-haired, wire-haired, or long-haired.
B. When Roxanne researched Dachshunds, the breed standard said that they can be short-haired, wire-haired, or long-haired.
From the given choices, select the correct answer and reply with the letter of the chosen option.
Answer: A