Which of the following sentences contains correct usage of its/it's?
a. its only a game.
b. let's go out on friday; it's my birthday!
c. the dog chased it's tail until it got dizzy.
d. my grandmother always said, "its not if you win or lose, but how you play the game

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.