The prefixes are a group of letters or one single letter placed and attached before the root word, and at the same time provides meaning to the complete word. For example "impossible" in this case the prefix would be "im".
Hence, the correct answer is letter <u>c. ex</u>
OK first of all I’m not going to write 150 words for you. But I will help you. There is irony in “I stand here ironing“. There is also onomatopoeia. But we don’t need that we need point of view. I stand here ironing say it 10 times. Start to feel the iron handle in your handle of mind. ironic ironing of i. continue.