Multi-choice problem: Continue writing the next sentence in this paragraph:

How to make a low calorie smoothie
Choose the right ratio of ingredients.
Start your smoothie with a liquid base. It should be added to your blender first before the fruits, vegetables, or other ingredients.

Possible answers: a). Added preservatives also create a thick, sugar-based smoothie. If you'd like a smoothie with a nutrient-rich material, like fruit, it's best to use a non-sugar formula that includes, , and. b). This will help the blender properly puree all of the ingredients and keep the water thoroughly mixed in. The most popular brands are pasadena and amazon. c). Make sure that you get a good balance of vitamins and minerals that your smoothie needs. Choose an organic mix of fruits and veggies for a higher calorie, healthy option. d). This helps protect the blades as well as helping things blend well. The ratio of the liquid base to the fruits and vegetables should be for every 2 cups of liquid base, add about cup of fruit, vegetables, or other ingredients.
d).