Which sentence should end with a question mark? O 1. Diane went to the door
O 2. How did Shane do that
3. We doubt if it's true
4. We'll wait until later

2.

Explanation:

It should be How did Shane do that?

B. How did Shane do that?

Explanation:

None of the other ones would make sense with question marks.

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the addition that would strengthen melissa’s thesis statement, both the dark game and the code book explain the importance of codebreaking, is :

main ideas of each book

melissa should discuss the main ideas of each book because these ideas will fully support her thesis statement. through these details, readers will also understand the importance of codebreaking that melissa referred to, which was inspired by the books.

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explanation: