Heated online arguments are technically dubbed as "flame wars," though I think that's a little extreme.
It is called SPIM (Spam over Instant Messaging). You also have email SPAM and SPIT (Spam over Internet Telephony, which means using the internet to make phone calls.
B) Line graphs show change over time
Answer:
Option D i.e., Backdoor is the correct answer.
Explanation:
Because backdoor is the virus that attack on the user's computer to provide unauthorized access to the hackers and it is very hard to detect, and in the following statement an issue occurred on the Ann's computer system when she open an invoice which is sent by any vendor then, several security warning appears on her system. So, that's why the following option is correct.