How do direct-reading instruments differ from laboratory analysis?

How do direct-reading instruments differ from laboratory analysis?

• A. Direct-reading provide real-time data; laboratory analysis provides precise concentrations from collected samples.
• B. Direct-reading measures only temperature; laboratory analysis provides precise concentrations.
• C. Direct-reading require lab processing; lab analysis is instantaneous.
• D. Direct-reading is qualitative; lab is only binary.

Answer: (A)