An observation states that an object's mass is about ten grams. What should be done for greater precision?

Correct answer: Record the actual reading using a suitable balance

The direct answer is A: record the actual reading using a suitable balance. An estimate such as “about ten grams” is approximate and may hide important differences. Mass should be measured with an appropriate balance, the reading should be read carefully at eye level when relevant, and the value should be recorded with the instrument’s suitable precision and unit. Option A is correct because it replaces guessing with an observable measurement. Option B, colour, describes appearance and does not give mass. Option C is wrong because repeating the same guess does not create new evidence or greater precision. Option D is wrong because another person’s opinion is not a calibrated measurement; another observer may help check a reading, but opinion alone cannot replace an instrument. Precision also depends on choosing an instrument suitable for the object and expected mass. Memory cue: measure the quantity with its proper instrument; never improve precision by repeating a guess.