Option (i) is correct. The provided context explains that in a weighted index, items differ in order of importance. It states that 'an equal rise in the price of an item with large weight and that of an item with low weight will have different implications for the overall change in the price index'. Since a commodity with 'little weight' has low relative importance, any change in its price will have a minimal effect on the total index calculation compared to a commodity with a large weight.