A.I. Explanation:

First sentence: Why this is the first line? This paragraph is the first sentence because it introduces the main topic of Volkswagen shares and their performance. It sets up the discussion without needing any prior context. It uses a broad overview to show the situation of Volkswagen shares. Why other lines are not choosen? Other paragraphs are not chosen because they do not stand alone. For example, Paragraph 2 starts with 'A disastrous capital hike,' which needs context. Paragraph 3 uses 'The main problem,' which assumes prior knowledge. Paragraph 4 starts with 'Many investors,' which also needs context. Paragraph 5 uses 'Volkswagen shares,' which refers back to the topic already introduced.

Concluding sentence: Why this is the last line? This paragraph is the last sentence because it wraps up the discussion about Volkswagen shares. It provides a summary of their current value and compares it to BMW. This gives a clear conclusion to the topic.

Paragraph pairs:

• Pair 1 (Paragraph 1 → Paragraph 2): Paragraph 2 connects with Paragraph 1 because it continues the idea of Volkswagen's issues. The phrase 'A disastrous capital hike' shows a cause for the discount mentioned in Paragraph 1. This is a cause and effect relationship.
• Pair 2 (Paragraph 2 → Paragraph 3): Paragraph 3 connects with Paragraph 2 because it explains the main issue. The phrase 'The main problem' shows that it is talking about the reasons mentioned before. This is a logical order.
• Pair 3 (Paragraph 3 → Paragraph 4): Paragraph 4 connects with Paragraph 3 because it shows the result of the problem. The phrase 'Many investors have been disappointed' explains what happened because of the past issues. This is a cause and effect relationship.
• Pair 4 (Paragraph 4 → Paragraph 5): Paragraph 5 connects with Paragraph 4 because it provides a fact about Volkswagen shares. It shows the current situation after discussing investor feelings. This is a logical order.