The graph below represents the total number of smartphones that are shipped to a retail store over the course of 50 days.

Match each part of the graph (A,B,C) to its verbal description. Explain your reasoning behind your choice.
I. half of the factory workers went on strike, and not enough smartphones were produced for normal shipments.

II. The production schedule was normal, and smartphones were shipped to the retail store at a constant rate.

III. A defective electronic chip was found, and the factory had to shut down, so no smartphones were shipped.

Based on the given verbal descriptions, the matching parts of the graph are as follows:

I. Part C represents half of the factory workers going on strike and not enough smartphones being produced for normal shipments. In this part of the graph, there is a significant decrease in the number of smartphones shipped. This decrease can be observed as a steep decline in the graph.

II. Part B represents the production schedule being normal and smartphones being shipped to the retail store at a constant rate. In this part of the graph, the number of smartphones shipped remains constant or nearly constant. This can be observed as a horizontal or near-horizontal line in the graph.

III. Part A represents a defective electronic chip being found, causing the factory to shut down and no smartphones being shipped. In this part of the graph, there is a complete absence of any shipments, resulting in a flat line at the bottom of the graph.

The reasoning behind the choices is based on the given verbal descriptions and the corresponding patterns observed in the graph. The graph visually represents the changes in the number of smartphones shipped, which align with the described events in the verbal descriptions.