A major class of anxiety-reducing drugs, ________, appears to reduce the symptoms of anxiety without interfering substantially with an individual's ability to function in daily life.Their most frequent use of these drugs is as sleeping pills.

A) barbiturates
B) benzodiazepines
C) azapirones
D) beta-blockers

The description of the drug class as reducing anxiety symptoms without interfering with daily functioning and having frequent use as sleeping pills matches the characteristics of benzodiazepines. Barbiturates can interfere with daily functioning and have a higher potential for addiction and overdose. Azapirones are also anxiety-reducing drugs but are not commonly used as sleeping pills. Beta-blockers are used to treat physical symptoms of anxiety such as rapid heartbeat, but do not directly reduce anxiety symptoms.