The price per box of ink pens advertised in an office supply catalog is based on the number of boxes ordered. The following table shows the pricing.
Number of Boxes Price per Box
1 up to but not including 5 $5.00
5 up to but not including 10 $3.00
10 or more $1.50
The following incomplete method is intended to return the total cost of an order based on the value of the parameter numBoxes.
/* Precondition: numBoxes > 0 /
public static double getCost(int numBoxes)
{
double totalCost = 0.0;
/ missing code /
return totalCost;
}
Which of the following code segments can be used to replace / missing code /so that methodgetCost
will work as intended?
I. if (numBoxes >= 10)
{
totalCost = numBoxes * 1.50;
}
if (numBoxes >= 5)
{
totalCost = numBoxes * 3.00;
}
if (numBoxes > 0)
{
totalCost = numBoxes * 5.00;
}

II. if (numBoxes >= 10)
{
totalCost = numBoxes * 1.50;
}
else if (numBoxes >= 5)
{
totalCost = numBoxes * 3.00;
}
else
{
totalCost = numBoxes * 5.00;
}

III. if (numBoxes > 0)
{
totalCost = numBoxes * 5.00;
}
else if (numBoxes >= 5)
{
totalCost = numBoxes * 3.00;
}
else if (numBoxes >= 10)
{
totalCost = numBoxes * 1.50;
}

Select one:
a. I only
b. II only
c. III only
d. I and II
e. II and III