Answer:
B. in the Tian Shan, Vavilov had likely found the wild ancestors of the domesticated apple
Step-by-step explanation:
The author most likely states that the wild apples growing in the Tian Shan looked like apples found at the local grocery store to support the point that in the Tian Shan, Vavilov had likely found the wild ancestors of the domesticated apple.
This is because, in the Tian Shan, Vavilov had discovered the wild ancestors of the domesticated apple which shows that they are similar to the apples in the local grocery store.