Answer:
04. Blend four ingredients before adding sweetener.
Step-by-step explanation:
The correct option is the fourth one. According to the recipe, we should blend the following four ingredients: yogurt, frozen fruit, an egg white, and fresh lemon juice. After that, we can add a sweetener if needed.
The rest of the options are incorrect because:
- Sugar isn't mentioned at all. Sweeteners are mentioned, but that doesn't equal sugar.
- An egg white should be blended along with other ingredients. Blending the mixture until the egg is white isn't correct.
- The mixture should be whipped until fluffy. The exact time isn't specified.