]Based on the graph, the most likely correct statement about the period between 1900 to 1950 is that there was no significant change in solar activity.
The graph shows the number of sunspots observed during this period, and if there were no significant changes in solar activity, it suggests that the sunspots remained relatively consistent. Sunspots are dark areas on the surface of the sun, and their presence indicates increased solar activity.
It is important to note that the graph does not directly provide information about global temperatures or climate. Therefore, we cannot conclude whether there was an increase or decrease in global temperatures based solely on the information provided in the graph.