Consider the following statements about the term "Hindustan" in medieval times:

A) In the 13th century, it referred to Punjab, Haryana, and the Ganga-Yamuna Doab.
B) Babur used it to describe the entire Indian subcontinent, including South India.
C) Amir Khusrau used the term similarly to Babur, focusing on geography and culture.
D) It carried the same political meaning in medieval times as it does today.

Which of the above statements is correct?