Examine the following statements about vectors:
I- A vector is a quantity that requires both magnitude and direction for its complete description.
II- Force, velocity, and acceleration are examples of scalar quantities.
III- The sum of vectors with parallel directions is simple: if they have the same direction, they are added; if they have opposite directions, they are subtracted.
IV- The sum of two or more vectors is called the resultant.
V- The tension in a rope is an example of a vector force.

a) I, III, and IV are correct.
b) II, IV, and V are correct.
c) I, II, III, IV, and V are correct.
d) Only IV is correct.