The correct answer is: A. Sentence capitalization
Sentence capitalization is the use of capital letters at the beginning of a sentence. This is done to indicate that the sentence is a complete thought.
Book title capitalization is the use of capital letters at the beginning of each word in a book title, except for articles (a, an, the), coordinating conjunctions (and, but, for, or, nor, so, yet), and prepositions (at, by, for, in, of, on, to, up, with).
Character capitalization is the use of capital letters at the beginning of each word in a character’s name. This is done to show that the character is a specific person or thing.
Word capitalization is the use of capital letters at the beginning of each word in a word. This is done to show that the word is a specific thing or concept.
In the case of the identifying label, the text is entered using sentence capitalization. This is because the text is a complete thought that is being expressed.