An example of constant velocity

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above

See the attachment and solve question 5th