1) I am wearing a sweater and a jacket I am cold. I am wearing a sweater and a jacket; because, I am cold. 2) The old dog is blind it is deaf. The old dog is blind; likewise, it is deaf. 3) Mix all the ingredients put the batter in the oven. Mix all the ingredients; then put the batter in the oven 3) To separate items in a list when commas alone would be confusing.

Anyone who is interested in history will like James Cross Giblin’s The Riddle of the Rosetta Stone because Giblin gives a lot of information about ancient Greek and Egyptian history.

Explanation:

This is the opinion that is supported by evidence. Option B provides a statement of fact. Option C is also written as a fact, which is why the author uses the world "clearly" to convey it. Option D is similarly not written as an opinion. Option A is clearly an opinion because the author has no way of knowing whether everyone who is interested in history will like the text. However, he has evidence that provides support to his opinion.