Please help! C++ problem! Select the best answer below: Write a function which accepts a vector of strings and returns the average of the lengths of the strings.

a)double averageLength(const vector &V) { double average = 0; for(int i=0;i

b)

double averageLength(const vector &V) { double average = 0; for(int i=0;i

c) double averageLength(const vector &V) { double average = 0; for(int i=0;i

d)

double averageLength(const vector &V) { double average = 0; for(int i=0;i