I've seen you ask the question, at least 4 times....what ever the answer is still A.
The answer is letter C because
Answer:
contrast
Explanation:
Because first his mood was happy/joyful and went to sad and depressed
<em><u>The future of transportation involves moving into new, smarter sources of energy, modes of transport and physical and technological infrastructure to support these transportation innovations. Three common themes in transportation innovation are: smart technology. electrification</u></em>