Which sentence is punctuated correctly? a. there's only one course of action that is appropriate—we need to leave town. b. theres only one course of action, that is appropriate, we need to leave town c. theres only one course of action that is appropriate we need to leave town. d. there's only one course of action that is appropriate, we need to leave town

D. There's only one course of action that is appropriate, we need to leave town

Explanation: A. Is wrong because it does not make sense to use a hyphen.

B. and C. are wrong because theres is wrong. You always use there's.

D. Is right because there is a comma instead of a hyphen and there's is spelled correctly.

Your group should have now written down the simple definiton of DNA and what it stands for Deoxyribonucleic Acid. Where it is found - nucleus. how does it look like. what it contains. etc. To make it interesting, make a scenario on how Genetic DNA is done. Model wise, show using materials or tools like magnet etc