The correct answer is C. Email bomb.
An email bomb is an attack in which the user receives an excessive amount of unwanted emails. This can be done by sending a large number of emails to a single address, or by sending a large number of emails to multiple addresses. Email bombs can be used to disrupt a user’s email service, or to overwhelm a server with so much traffic that it crashes.
Spoofing is a technique used to send emails that appear to come from a different sender than the actual sender. This can be done by forging the sender’s email address or by using a fake domain name. Spoofing is often used in phishing attacks, where the attacker tries to trick the user into clicking on a malicious link or opening a malicious attachment.
Smurf attack is a type of denial-of-service attack in which the attacker sends a large number of ICMP echo requests (pings) to a broadcast address. The host that receives the pings will then reply to each ping, which will cause the attacker’s computer to receive a large number of replies. This can overwhelm the attacker’s computer and cause it to crash.
Ping storm is a type of denial-of-service attack in which the attacker sends a large number of ICMP echo requests (pings) to a single IP address. This can cause the target computer to become overloaded and crash.