Answer:
Option B is the answer.
Explanation:
Option A). 3 pounds and 1 ounce
It's not valid because electronic scale can measure 1/100th part of a pound and the weight given is the measurement of a scale that can measure up-to 1/10 part of a pound.
Option B) 3.16 pounds is the answer.
Option C). 3.161 pounds
not true because this weight can be measured by a scale which can measure to 1/1000 of a pound.
Option D). 3.1611 pounds
not true because this measurement can be done with a scale which measure to 1/10000 of a pound.