The given sentence, "After selecting the appropriate option, click the button, and then save to the appropriate file directory." is a complete sentence. Hence, Option A is correct.
For expressing the thoughts in a proper way, either in written form or verbal form, words are arranged properly or that arrangement of words is known as a sentence. The sentence can be stated as a basic unit of language that is used by every individual to express thoughts or to convey a message. A subject has two parts one is the subject and the other one is the predicate.
One must be clear with the thought or the message that is to be given to the other so that the sentence can be framed properly. There are few types of sentence also which is used by individual at different different tme for conveying the message. Like Complex, Imperative, Simple, Interrogative, and many more.
Thus, the given statement is complete.
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