Answer:
"Option 1: To the end of an array." is the correct answer.
Step-by-step explanation:
The word "Append" means adding to the end of a document.
Appending means whatever new content is added, it is added at the end of the document or data structure.
Similarly,
Appending an array means adding new elements to the end of the array.
Hence,
"Option 1: To the end of an array." is the correct answer.