Question

what did we learn about cigarette filters that were marketed as creating a safer cigarette? (multiple choice)
filters effectively caught all harmful chemicals
cigarette filters are fully biodegradable
filtered cigarettes do not pose any health risks
no cigarette, filtered or unfiltered, is truly safe

Explanation:

Cigarette filters do not catch all harmful chemicals, are not fully biodegradable, and filtered cigarettes still pose health risks. In reality, no cigarette is truly safe.

Answer:

No cigarette, filtered or unfiltered, is truly safe