What is the central idea of this paragraph?
Although traffic analysis, tempest attacks, viruses and
Trojan horses are all useful techniques for gathering
information, cryptanalysts realize that their real goal is to find a way of cracking the RSA cipher, the cornerstone of
modern encryption. The RSA cipher is used to protect the
most important military, diplomatic, commercial and criminal communications exactly the messages that intelligence gathering organizations want to decipher. If they are to
challenge strong RSA encryption, cryptanalysts will need to make a major theoretical or technological breakthrough.
a) The Trojan horse technique is most effective in data gathering
b) The RSA cipher secures much of the world's important information.
c) Information gathering will fail without new technology
development.
d) Breaking RSA code is the greatest challenge for
cryptanalysts.

What is the best revision of this statement from the body of a cover letter?

Pls due today which excerpt from the text most effectively demonstrates that the narrator's point of view about the cabuliwallah has changed? "i felt a little sorry, and would have called him back, but i found he was returning of his own accord." "i sent for mini immediately from the inner apartment. many difficulties were raised, but i would not listen." "tears came to my eyes. i forgot that he was a poor cabuli fruit-seller, while i was—. but no, what was i more than he? he also was a father." "i took them and was going to pay him, but he caught my hand and said: "you are very kind, sir! keep me in your recollection. do not offer me money! —"

Read the passage first of all if someone says your dream is impossible, they’re wrong. you can’t prove that something is impossible-all you know is that[it] hasn’t been done yet. people said no one could scale mount everest but in 1953, sir edmund hilary and tenzing norway gazed down upon the world from it’s summit. people said that man could not fly, but in 1903, orville and wilbur wright made the first sustained powered flight in a heavier-than-air machine. people said, “okay, we admit that someone could climb mount everest, and we admit that man has learned to fly, but no one will ever, ever walk on the face of the moon.” if we can send three men a quarter of a million miles away and bring them home safely, is there any great task we cannot accomplish? which identifies the textual evidence that best supports the claim: the authors purpose is to persuade? a: the author shares historical information about the wright brothers. b: the author states that men have walked the moon. c: the author states that others who think your dreams are impossible are wrong. d: the author wants to know what tasks we cannot accomplish.