Because it is a. neither excludable nor rival in consumption, a tornado siren is a common resource. b. rival in consumption but not excludable, a tornado siren is a common resource. c. excludable but not rival in consumption, a tornado siren is produced by a natural monopoly. d. neither excludable nor rival in consumption, a tornado siren is a public good.

D, neither excludable nor rival in consumption, a tornado siren is a public good.

Explanation:

A tornado siren is a siren that is used to give emergency warnings to a large population of an impending danger or danger that has passed.

A tornado siren otherwise known as the civil defense siren is of public good and as such is not a rival neither can it be excluded from consumption.

Cheers

answer; purpose nondisclosure;

answerthe above statement is false;