In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".

[header] How to avoid sentence fragments [title] Start your sentence with a capital letter. [step] Capitalize the first letter of your sentence. This will let your reader know a new thought is starting. <sep> (A) [title] Use both a subject and a verb. [step] Craft your sentence so a subject-either a person, place, idea or thing-is performing an action or state of being, the verb. (B) It will also help that you are trying to make the idea proper. [substeps] For example, the first letter of the verb " engineering " would be capitalized and could also start with " imagining ". (C) When someone has a thought, they will be excited to sit down and think about it. [substeps] Common capital letters include: d, o, w, p, l, and k. (D) You should write a central exclamation point, complete with a capital letter, next to one of the middle letter of the first letter of your sentence. [substeps] For example, if you want to start your sentence by saying " they walked, " " always headed around town, " or " they woke up after midnight, " the first exclamation point should be an a.
A