Final answer:
To ensure no used cartridge is left in the analyzer chamber, the proper procedure is to inspect it thoroughly. This involves a visual check to confirm that all materials have been removed.
Step-by-step explanation:
The question seems to be about procedures for handling equipment in a biology lab. To ensure no used cartridge is left in the analyzer chamber, the correct option would be A) Inspect it thoroughly. This involves visually checking the analyzer chamber to make sure that no cartridges or other materials are left inside after use. While cleaning with a cotton swab may also help ensure cleanliness, it is not about ensuring a cartridge is not left inside but rather about making sure the chamber is free from residues. A special tool may be used for removing or installing cartridges but does not inherently ensure no cartridges are left behind after an experiment. Disposing of it properly is important for safety and hygiene but happens after a cartridge is already removed.