The clue to this question lies in the phrase - ‘However, with all its flaws’. The first word should highlight something negative in Britain’s actions. ‘Complicit in the kind of economic growth that strangulates the poor' fits well. In the second sentence, since it starts with ‘however’ we are looking for something that has a positive connotation. ‘Conscientious’ therefore is appropriate. Another option, which can be considered is (b). ‘Involved’ would fit the first blank but ‘judicious’ is primarily used to imply ‘wise’ or ‘of sound judgement’. This does not set up the contrast with the actions of other western peers that well. ‘Conscientious’ on the other hand means ‘having moral integrity’. This is a much better contrast with the actions of other nations, which are acting to serve their own purposes. Options (a) and (d) can be eliminated as the words ‘persuasive’ and ‘prudent’ are inappropriate in the context.