Question

allied and neutral shipping losses (1917)
according to the chart, allied and neutral shipping losses first reached 600,000 tons in
based on the graph, the allies could shipping losses in may and june to
february 1916
march 1916
march 1917
april 1917

Explanation:

Step1: Analyze the graph's x - axis and data points

The x - axis of the graph is labeled with months in 1917 (Jan, Feb, Mar, Apr). We look at the y - axis value of 600,000 tons and find the corresponding month on the x - axis.

Step2: Identify the month for 600,000 tons

From the graph, the data point that reaches 600,000 tons is at the "Mar." (March) label on the x - axis, and the year is 1917 as per the graph title "Allied and Neutral Shipping Losses (1917)".

Answer:

March 1917