Correct Option: B

C E is the key. Passage must begin with C with its ‘however promising the prospects for growth may be’ as it introduces the issue of ‘current production constraints.’ A, B, D and E cannot begin the passage with their ‘Each year,’ ‘Choosing what,’ ‘The fact’ and ‘There is still’ respectively. E should obviously follow C which talks of ‘a limit’ to production, D should follow E with its ‘fact that those limits’ which refers to ‘a limit’ to production mentioned by E, A should follow D with its ‘Each year we still have to choose,’ B should follow A and conclude the passage with its ‘choosing what to produce - a mix of output’ which refers to A’s ‘we still have to choose some mix of output!’ Option (a): Passage wrongly begins with A whereas A should follow D and precede B, telling ‘each year we still have to choose some mix of output’ and so on. Option (c): Passage wrongly begins with D whereas D should follow E which in turn should follow C, telling ‘those limits may expand in future years’ which refers to ‘a limit’ to production mentioned by E. Option (d): passage wrongly begins with A whereas A has to follow D, telling ‘we still have to choose some mix of output’ and so on. Except (b) other options are wrong.