Question: The fastest and easiest way to open your AD2 file is to doubleclick it
Please fix the punctuation.
Fixed: [The fastest and easiest way to open your AD2 file is to double-click it.]

Question: Ingredients corn sugar salt corn starch Arabic gum emulsifier sunflower lecithin
Please fix the punctuation.
Fixed: [Ingredients: corn, sugar, salt, corn starch, Arabic gum, emulsifier: sunflower lecithin.]

Question: A buffet breakfast is served at the spacious restaurant which offers Polish and international dishes
Please fix the punctuation.
Fixed: [A buffet breakfast is served at the spacious restaurant, which offers Polish and international dishes.]

Question: You can also find out which package installed it by using dpkg search
Please fix the punctuation.
Fixed:
[You can also find out which package installed it by using dpkg --search.]