One student suggests using a front-loading washing machine instead of a top-loading washing machine to conserve water. Which of these statements best describes the suggestion made by the student?

a. It is practical because it is easy to implement.
b. It is practical because a top-loading machine uses much more water than a front-loading machine.
c. It is not practical because all washing machines use the same amount of water.
d. It is not practical because front-loading machines are more expensive than top-loading machines.