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A pupil gave the following reasons as to why dairy cattle are given commercial feeds.
(i) To increase milk production.
(ii) Given only to cattle under zero grazing.
(iii) To supplement other feeds
(iv) Only when fodder crops and pasture are not available.
Which two reasons are CORRECT?
A.(i) and (iii)
B.(ii) and (iv).
C.(i) and (iv)
D.(ii) and (iii).