A test of writing is :

Correct option is C

Dictation is a process where a speaker reads aloud and the listener is required to write down what they hear. This activity primarily serves as a test of writing skills, assessing the learner's ability to correctly transcribe spoken language into written form. It evaluates aspects such as spelling, punctuation, and handwriting accuracy.
While the other options involve language skills, they do not directly test writing. Skimming is a reading strategy, debating is related to speaking and critical thinking, and listening focuses on auditory comprehension.
Information Booster:
 Dictation helps assess a learner's writing accuracy and speed.
 It tests spelling, punctuation, and grammar.
 Dictation can also improve listening skills, but its primary focus is on writing accuracy.
 It is often used in language learning contexts to evaluate writing proficiency.
 Teachers may use dictation to highlight common writing errors for feedback and improvement.
Additional Knowledge:
 Skimming: Skimming is a reading strategy to quickly grasp the main idea of a text, not a writing test.
 Debating: Debating focuses on oral communication and argumentation skills.
 Listening: Listening evaluates comprehension of spoken language but does not directly test writing.