Rank the following reactive intermediates in order of decreasing reactivity:

• A. (ii) > (iii) > (iv) > (i)
• B. (iii) > (ii) > (i) > (iv)
• C. (iv) > (i) > (ii) > (iii)
• D. (i) > (iv) > (iii) > (ii)

Answer: (C)