Which of the following measurement is more accurate?

Options

A. 40m
B. 4.0m
C. `4.00m`
D. `4.000m`

Answer

To determine which measurement is more accurate among the given options, we can analyze the precision of each measurement based on the decimal places they represent.

### Step-by-Step Solution:

1. **Identify the Measurements**:
- Option A: Measures in whole meters (unit place).
- Option B: Measures in tenths of a meter (one-tenth place).
- Option C: Measures in hundredths of a meter (one-hundredth place).
- Option D: Measures in thousandths of a meter (one-thousandth place).

2. **Understand the Precision**:
- The more decimal places a measurement has, the more precise it is.
- Option A (whole meters) has the least precision since it only considers whole numbers.
- Option B (tenths) is more precise than A because it includes one decimal place.
- Option C (hundredths) is more precise than B as it includes two decimal places.
- Option D (thousandths) is the most precise as it includes three decimal places.

3. **Compare the Options**:
- Based on the decimal places:
- A: 0 decimal places
- B: 1 decimal place
- C: 2 decimal places
- D: 3 decimal places
- Therefore, Option D, which measures up to the thousandths place, is the most accurate.

4. **Conclusion**:
- The measurement that is more accurate is Option D, which measures in thousandths of a meter.

### Final Answer:
**Option D is the most accurate measurement.**

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