I need help for this, thank you

Which statement explains what upwelling causes? a. upwelling causes tides to rise and fall. b. upwelling causes changes in the direction of currents. c. upwelling causes nutrients, minerals, and tiny organisms to rise. d. upwelling causes currents in the pacific ocean to change direction. i think the answer is c.

After railroads, the next revolution of transportation came with the development of (a) automobile (b) telegraph (c) steam engine

Why might a geographer choose to present information in a map rather than with stactics or in me asap