Which sentence below shows correct use of em dashes?

before his european travel highlight of his summer, mickey forced-himself to pay-off his credit cards.

before his highlight of his summer european travel – mickey forced himself to pay off his credit cards.

before his european travel, the highlight of his summer mickey – forced himself to – pay off his credit-cards.

before his european travel – the highlight of his summer – mickey forced himself to pay off his credit cards.

Read the excerpt from the common sense of bicycling: bicycling for ladies. the bicycle is capable of such high speed that there is a strong temptation to ride so fast as to cause over exertion or excessive perspiration. on the other hand some people ride too slow, causing a zigzag and uncertain movement. while exercising reasonable caution, be a fearless rider. when you come to a steep hill, if the road is clear, let it go as fast as it will. if you rid yourself of that ghost of fear, coasting is one of the greatest delights of cycling. which is the best paraphrase of the text?

What is the meaning of "full tide" as it is used in this sentence? before i could explain to her the differences of language in this world, she was embarked on the full tide of another subject. a long and involved argument an inaccurate representation a detailed and lively discussion an uncontrollable flood

Which best expresses the irony present in this passage?