Here's a problem to solve: When a person parachutes from a plane, she travels at about 67 meters per second. When she pulls her cord and her chute opens, she slows to about 3 meters per second. If the velocity and acceleration are both considered positive before the chute opens, how do her velocity and acceleration change when the chute opens?

Among the 4 following options, which is the correct answer?

- A: Velocity and acceleration both remain positive.
 
- B: Velocity and acceleration both become negative.
 
- C: Velocity remains positive but acceleration becomes negative.
 
- D: Velocity becomes negative but acceleration remains positive.
 