Select the phrase(s) from the given three options which can be used to form a single sentence from the two sentences given below, implying the same meaning as expressed in the statement sentences. The given options may or may not be starters.
A. 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.
B. The analogy to nuclear deterrence is misleading, because, where nuclear weapons are concerned, the aim is total prevention. 1. Because the analogy... 2. However, the analogy... 3. But the analogy…

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.”