Serena, an assistant district attorney, has always dreamed of becoming a Supreme Court Justice. Realizing this goal would fulfill which level of Maslow's hierarchy?

Marginal costs are the ______ cost(s) of each additional copy or unit of a product

a. first-copy b. demand c. incremental d. distribution

Frank Conrad began the first regularly scheduled radio broadcasts in the United States in 1920

Indicate whether the statement is true or false.