What is most closely the central idea of the passage below?

When we got to our house the ayah was just taking a tray of lunch into Mother’s room. She immediately started a long, worried questioning about what are your children doing back here at this hour of the day.

Mother looked very startled and very concerned, and asked Premila what had happened.

Premila said, “We had our test today, and she made me and the other Indians sit at the back of the room, with a desk between each one.”

Mother said, “Why was that, darling?”

“She said it was because Indians cheat.” Premila added. “So I don’t think we should go back to that school.”

Mother looked very distant, and was silent a long time. At last she said, “Of course not, darling.” She sounded displeased.
Answer choices for the above question

A. The school treated Indian children unfairly.

B. Premila is stubborn.

C. Mother is unhappy with Premila.

D. Premila wishes she fits in at the school.

A. The school treated Indian children unfairly.