When he says this line "a knavish speech sleeps in a foolish ear" he is telling Rosencrantz that his good advice has been lost on his "friend's" stupidity and desire to be in the good graces of the king.
Answer:
Trojan horse
Explanation:
The malicious actor was trying to con users into executing the Trojan horse virus. The Trojan horse is a deceptive virus that acts as an "innocent" application. Although this virus do not have the ability to replicate themselves, they are however very destructive. Trojan horse can help perpetrators gain a presence inside a network and further introduce virus into the network.
Participles are words formed from verbs that can be used as adjectives. In this sentence, "roaring" would be B, participle.
Answer: Confederal
Explanation: Hope this help :D