What does the expression “75 meters per second southeast” best describe? a acceleration b distance c speed d velocity

Answer is: D. velocity.

Velocity is equivalent to a specification of its speed and direction of motion, for example 300 km/h to the east.

Velocity is a physical vector quantity (measured in metres per second) and need magnitude and direction to define it, for example 100 metres per second east.

c. 75.7

i think that is the right

a corroding iron, if that's one of your choices