Question: How do I mix weed killer in a manual sprayer?

  Options: 
 A. Close the basin of the sprayer and pour in 3 cups of weed killer first and then 3 gallons of water, put the cap on and you are ready to spray.
 B. Open the basin of the sprayer and pour in 3 cups of weed killer first and then 3 gallons of water, put the cap on and you are ready to spray.
Answer: B