Question: To unclog a sink drain using boiling water,

  Options: 
 A. combine salt and baking soda and put it down the drain, use the stove to boil some water in a tea kettle and then pour it down the drain, then flush the drain with water from the faucet.
 B. combine salt and baking soda and put it down the drain, use the stove to boil some water in a teaspoon and then pour it down the drain, then flush the drain with water from the faucet.
Answer: A