What is the central idea of this paragraph? O The Trojan horse technique is most effective in data
gathering
O The RSA cipher secures much of the world's
important information.
O Information gathering will fail without new technology
development
O Breaking RSA code is the greatest challenge for
cryptanalysts.

i think that the answer is substandard.

one of the central themes of edward abbey's work has been his staunch opposition to the glen canyon dam on the colorado river that created lake powell, destroying stunning scenery and wildlife habitat, endangering many rare species of fish and animals, and also irreparably destroying many important archaeological sites which provided information about the early inhabitants of the united states.