It depends on what it looks like, is there any other picture?
C, details that help readers visualize the settings better. A wouldn't work because it doesn't help the setting, B doesn't help the setting either and D would only add more confusion so UT would have to be C by process of elimination.
https://www.litcharts.com/lit/the-things-they-carried/themes/shame-and-guilt
Answer: (A) The Little Ice Age caused shortages of food and reduced the amount of agricultural surplus available for trade.
Explanation:
Whilst the graph is not available, the most likely answer is option A.
The Little Ice Age was a period between the early 14th century and mid 19th century that was so cold that rivers such as the Baltic froze and winters were particularly longer than before.
This led to the planting season being so shortened that there were food shortages and countries were unable to sell much produce as surplus because they needed it themselves.