The legend, or key, is used to display what stuff means on the map. This makes it easier to spot, rivers, capitols, parks, hospitals and everything else that the map might be centralized upon. Its basically your guide to reading the map and its markings. <span />
Answer:
b. did not initially cover all categories of workers.
Explanation:
The American Social Security System was very different from what we know today, in its early years of establishment, during the New Deal. The main difference was that it did not cover all professional categories (which made it different from the European pension system). Professional categories were included in this system as the US economic condition strengthened through other New Deal reforms. This happened little by little, until it became what we know today.
Depending on the country referred, some would not recommended during days that are prone to accident. However, this rule may not be entirely true. Student's can still practice. Thank you for your question. Please don't hesitate to ask in Brainly your queries.