Select the phrase(s) from the given three options which

Solution

The sentences share a contradictory relationship - A tells us how it is hard to understand deterrence in cyberspace since the context of a threat of a nuclear attack clouds our understanding, and B contradicts it by telling us how this analogy is misleading as the aim is total prevention of attacks. 2 is correct as HOWEVER is used to show contradiction - “Understanding deterrence is often difficult, because our minds remain captured by an image of deterrence shaped by the Cold War: a threat of massive retaliation to a nuclear attack by nuclear means, however, the analogy to nuclear deterrence is misleading, because, where nuclear weapons are concerned, the aim is total prevention.” 3 is correct as BUT is used to show contradiction - “Understanding deterrence is often difficult, because our minds remain captured by an image of deterrence shaped by the Cold War: a threat of massive retaliation to a nuclear attack by nuclear means, but the analogy to nuclear deterrence is misleading, because, where nuclear weapons are concerned, the aim is total prevention.”