"Isn't" is the best option from the list in terms of completing these sentence. This is primarily because "isn't" is a contraction of the two words "is" and "not.
(D) pig fly
It shows the action which is being done upon the subject of the sentence which is the pig.
The best way to prevent tooth decay in children is to: C. Use natural sugars such as maple syrup, rather than refined sugars. Hope that helps.
If your grow up in a violent neighborhood it doesn’t mean that makes you a violent person because I grew up and is still growing in a not really good area and I’m not violent and shooting people I like to focus on my school work so I can have a better future.