Question: To thicken syrup made with berries.

  Options: 
 A. Mash a few raspberries and blueberries until I had enough juice. I added a pinch of Arrow Root starch flour and mixed it thoroughly. I cooked it over a low heat until it just began to thin.
 B. Mash a few raspberries and blueberries until I had enough juice. I added a pinch of Arrow Root starch flour and mixed it thoroughly. I cooked it over a low heat until it just began to thicken.
Answer: B