A scientist is comparing pyrosequencing and Ion Torrent sequencing for a new project. What is a key difference in their detection methods?

• A. Pyrosequencing uses capillary gel columns, while Ion Torrent sequencing uses gel electrophoresis.
• B. Pyrosequencing requires radioactive labeling, while Ion Torrent sequencing uses fluorescent tags.
• C. Pyrosequencing measures DNA strand length, while Ion Torrent sequencing measures nucleotide incorporation.
• D. Pyrosequencing detects light emission, while Ion Torrent sequencing detects pH changes.

Answer: (D)