Which of the Following Statements About Ionization Smoke Detectors Is

Which of the following statements about ionization smoke detectors is MOST accurate?

A) Ionization smoke detectors detect tiny amounts of radioactive material emitted by burning fuel.
B) Ionization smoke detectors generally respond faster to smoldering than to flaming fires.
C) Ionization smoke detectors detect products of combustion using tiny amounts of radioactive material.
D) Ionization smoke detectors are sensitive to sunlight, and are usually installed in fully enclosed areas.