Question

to improve understanding of the excerpt, which questions are best to ask? choose three correct answers.
what kind of encryption was available a long time ago?
what does “encryption” mean?

Explanation:

To understand the excerpt better, knowing the meaning of key - terms like "encryption" and who "cryptanalysts" are helps. Also, understanding past encryption can provide context for the development of current strong encryption methods.

Answer:

• What kind of encryption was available a long time ago?
• What does "encryption" mean?
• Who are "cryptanalysts"?