Given the equations below, which description best fits the physical situation?
?
?
A. A projectile's displacement two seconds after being fired upward with a speed of 30.0 m/s.
B. A projectile's displacement two seconds after being fired upward with a speed of 40.0 m/s.
C. A projectile's displacement two seconds after being fired upward with a speed of 50.0 m/s.
D. A projectile's displacement two seconds after being fired upward with a speed of 60.0 m/s.
E. A projectile's displacement two seconds after being fired upward with a speed of 80.0 m/s.
Answer: B
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?
A. 
B. 
C.
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