Matching measurement tool to length precision

Steps:

• Identify the length and required accuracy for each option.
• Evaluate device precision: micrometers measure to 0.01 mm, calipers to 0.1 mm, meter rules to 1 mm, tape rules to 5 mm or more.
• Compare: smallest lengths need highest precision tools to minimize error.
• Select option where device matches or exceeds length's precision needs.

Why A is correct:

• Micrometers provide 0.01 mm resolution, ideal for accurately measuring small lengths like 0.15 mm per standard metrology practices.

Why the others are wrong:

• B: Meter rules lack 0.5 mm precision (typically 1 mm), unsuitable for small measurements.
• C: Tape rules are imprecise (5+ mm) for 0.15 m, better for large distances.
• D: Calipers handle up to 0.1 mm but are overkill or mismatched for 0.5 m lengths, which need longer tools.

Final answer: A