A genetic engineer wants to modify a virus to insert a synthetic gene into human lung cells. Which modified viruses would achieve her goal

1. The correct answer is C, because in A, there should be a comma after Europe, not a full stop. In B, the comma should be before the quotation marks, not after. In D, there should be a comma before Tim and the quotation marks. 2. The correct answer is D, because in A, there should be a comma after said, in B, no comma is needed after that, and in C, the full stop should be within the quote, not outside of it. 3. The correct answer is C, because in A, the exclamation mark should be within the quote, in B, there should be a question mark within the quote instead of a comma, and in D, there should be a comma after declared. 4. The correct answer is A, because in B, there are no quotation marks, in C, the beginning of the quote is not capitalized, and in D, there should be a comma after said. 5. The correct answer is D, because in A, there should be a comma after exclaimed, in B, there should be a comma after oh, and in C, there should be a comma after twice, and not a full stop.