Final answer:
The potato is a crop that Europeans first found in the New World during the Columbian Exchange, while sugarcane was brought by Europeans to the New World and became highly significant in the Americas.
Step-by-step explanation:
When Europeans first encountered crops in the New World, one of the key crops they discovered was the potato. Originating from the New World, the potato, along with maize (corn), tobacco, and certain other crops such as the sweet potato, became staples in European diets. This was a part of what is known as the Columbian Exchange, which also saw crops such as sugarcane brought to the Americas; although note that while sugarcane became incredibly significant in the New World, it actually originated in the Old World and was transplanted to the Americas by Christopher Columbus. When examining the options provided, sugar cane was the crop that did not originate in the New World but had a profound impact once introduced there.