As the majority of the population live in the island of Trinidad, this is the location of most major towns and cities. There are four major municipalities in Trinidad: Port of Spain, the capital, San Fernando, Arima and Chaguanas. The main town in Tobago is Scarborough.
B = 3! Because there is 3 lines in total
I'm not sure 100% what exactly this question is asking, but I know World War 1 was the first war to include Gas masks and Chemical warfare, so that is more than likely the answer.