It would be the last one, because she isn't recording any type of data over what she is doing and she isn't observing it at all. She simply trimmed the stems of a bouquet of flowers. However, the other options insist that they are recording data and observing, like you would do when performing an experiment. I hope this helps! :)
Here's the complete question below that clarifies what you need to do
<u>Explanation</u>:
"In this task, we will study the performance of public-key algorithms. Please prepare a file ( message.txt) that contains a 16-byte message. Please also generate an 1024-bit RSA public/private key pair. Then, do the following:
1)Encrypt message.txt using the public key; save the the output in message_enc.txt.
2)Decrypt message_enc.txt using the private key.
3)Encrypt message.txt using a 128-bit AES key.
<em><u>Compare the time spent on each of the above operations, and describe your observations. If an operation is too fast, you may want to repeat it for many times, i.e., 5000 times, and then take an average.</u></em>
<em><u> After you finish the above exercise, you can now use OpenSSL's speed command to do such a benchmarking. Please describe whether your observations are similar to those from the outputs of the speed command?</u></em>
<span>Advances in technology are one of the main reasons that globalization has escalated in the past decade. In information and communication technology, innovations have become smaller in size, more efficient and often more affordable. In transport technology, vehicles have tended to become larger and faster, as well as becoming more environmentally friendly and cheaper to run. Whether for personal use or for business, technology has made the world seem a smaller place and assisted in the rise of globalization. </span>
