Q: The method to convert a lowercase character to uppercase is:

Answer: C

Explanation:

We want to convert a lowercase character to uppercase.

(a) String.toUpperCase() → This converts an entire string to uppercase, not a single char.
(b) Character.isUpperCase(char) → This checks if a character is uppercase; it does not convert it.
(c) Character.toUpperCase(char) → ✅ This converts a single character to uppercase.
(d) toUpperCase() → This is incomplete; we need the class or object it applies to.

Answer: (c) Character.toUpperCase(char)

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