I NEED THIS ASAP Which phrase describes the element carbon-14?

decays at an unknown rate
found in an organism’s remains
forms from the breakdown of nitrogen-14
is measured to determine the age of sedimentary rocks

An externality can be created by a. people working at a production job and enjoying their work b. a production activity but not a consumption activity c. a consumption activity but not a production activity d. a production activity or a consumption activity externalities a. are always positive, and an example is flu vaccinations b. are always negative, and an example is the pollution created by trucks c. can be negative or positive. logging has a negative externality, and education has a positive externality d. can be negative or positive. a negative externality is having to go to school when you would rather go to the beach, and a positive externality is spending time with your friends

Popular culture mainly encompasses the realm of a-politics b-religion c-business d-entertainment

Describe two reasons that cities developed along rivers during the industrial revolution. for full credit, your response must be at least 2 complete sentences.