Which one of the following sets of conditions predispose a cow to metritis? A - Strep. agalactiae mastitis, retained placenta, laminitis B - Milk fever, malnutrition, excess dietary zinc C - Dystocia, overfeeding in dry period, Ca-P imbalance in feed D - Agalactia, milk fever, bovine vibriosis E - Contaminated calving environment, abortion, hypomagnesemia

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