The most effective and economical means of reducing the exposure of cows to mastitis causing microorganisms is to _________

• A. Isolate animals with clinical mastitis
• B. Disinfect or sterilize milking machine inflation’s between cows
• C. Wear rubber or plastic gloves during milking and disinfect the gloves between cows
• D. Use a bactericide for disinfecting the teats after milking