The following are the proper way of using and handling simple machines except one. Which is it?
A. Place them inside a cabinet or in a place out of reach of children after using them.
B. When handling simple machine to someday, the sharp edge should be facing downward.
C. Let young children play with simple machine.
D. Make sure simple machine are in good condition before using them.

You noticed your father cleaned the bolo and placed in a sheath after using it. Why do you think your father did this.
A. To avoid accident
B. To prevent it from rusting.
C. To sharpen it
D. Both A and B​