Smartphones are examples of negative externalities

In 1879 . President Rutherford B. Hayes had the first telephone installed in the White House, but it was rarely used because:

a. he didn't know what it was b. it kept breaking and no one could fix it c. hardly anyone else in Washington had a telephone, so there was no one to call or to call in d. hand written letters were considered a more correct form of correspondence

Gross domestic product is the value of all final goods and services produced within a country during a given period of time

a. True b. False Indicate whether the statement is true or false