They find out that they are on opposite families and in their world they are not allowed to date if that is true. The story and/or movie shows and states the scene of the act.
The correct sentence is the second one "She built a high-performance CPU".
The first sentence should not contain a comma and is incorrect. The third sentence is incorrect because there shouldn't be a dash before CPU. The fourth sentence is incorrect because CPU is not written with dashes.
Diction is the author's word choice.
So A, otherwise known as the first choice in your list.
Hope this helps!
The present progressive tense is created by combining the present participle of the primary verb with the present tense of the verb be.
It can also be used to discuss an action that will take place in the future or that is taking place concurrently with another action. It is created by combining the present participle of the primary verb with the present tense form of the verb to be.
An action that is currently taking place is described using the present progressive. "I am reading right now," for instance. Observe how this construction differs from the present simple (I read), present perfect (I have read), and present perfect progressive (I have read) ("I have been reading").
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