The following statements refer to strategic planning: (i) It is concerned with quantifiable and qualitative matters. (ii) It is mainly undertaken by middle management in an organisation. (iii) It is concerned predominantly with the long term. Which of the statements are correct?
A、(i) and (ii) only
B、(i) and (iii) only
C、(ii) and (iii) only
D、(i), (ii) and (iii)