In the second paragraph, the pronoun "them" refer

Đáp án A
Ở đoạn 2, đại từ “them” ám chỉ đến cái nào sau đây?
A. Pilgrims
B. Những chiếc tàu mà người Pilgrims đã dùng để đi từ Anh đến Mỹ
C. Những người Mỹ bản địa
D. Các trường học.
Dẫn chứng: In 1620 the ship the Mayflowers arrived, bringing about 150 people who today are usually called Pilgrims. They arrived at the beginning of a very hard winter and could not find enough to eat, so many of them died. But in the following summer Native Americans showed them what foods were safe to eat, so that they could save food for the next winter.