Final answer:
To omit the first two elements of a list in Python, use the slicing operation data[2:], which starts the slice from the third element to the end of the list.
Step-by-step explanation:
To create a copy with every element in the original list except for the first two, the correct slicing operation would be B. data[2:]. This operation will start the slice from the third element to the end of the list since Python list slicing starts with index 0. So if data is [1, 2, 3, 4, 5], data[2:] would result in [3, 4, 5].