Smith and Jones comprise a two-person economy. Their hourly rates of production are shown below. If Smith and Jones are dividing their time efficiently and producing fewer than 10 computers and more than 120 calculators per hour, then Smith will and Jones will A) split his time between computers and calculators; produce only calculators B) produce only calculators; split his time between computers and calculators C) produce only calculators; produce only computers D) produce only computers; produce only calculators C) D) B) A)