Final answer:
The TITLECASE function is used to format strings so that the first letter of each word is capitalized, and the rest of the letters are in lowercase. The correct answer to the student's question about the function converting character strings to mixed-case with each word beginning with a capital letter is B) TITLECASE.
Step-by-step explanation:
The function that converts character strings to mixed-case, with each word beginning with a capital letter, is referred to as the TITLECASE function. This function is commonly found in many programming languages and software applications, where it is used to format strings such that each word starts with an uppercase letter, while the rest of the letters are in lowercase. For example, the string "hello world" when processed by the TITLECASE function would become "Hello World".
It's important to note that the TITLECASE function is different from the UPPERCASE function, which converts all the characters in a string to uppercase, and the PROPCASE, which is not a standard term used in programming or text formatting. The CAPCASE is not a commonly used term either. Thus, the correct answer to the student's question is B) TITLECASE.