Answer:
a chain of reasoning consisting of a set of reasons that supports some conclusion
Explanation:
An argument is in philospical sense ,a statement that has premises and lead to a conclusion.
Premises are statements that logically probe a conclusion.
The premises often are statements difficult to deny. The deductive nature of reasoning makes arguments the use of logical consequence of assuming a premise over the other.
When someone makes a statement is made, the premises will be reviewed to find what objections can be done to an argument or how this argument can be supported.
Arguments lead to conclusions, so it is important to check if the premises are valid for all the cases so they can lead to sound arguments.
D- British Shipping Routes.
Well the words "At first" kind of suggests that that was what someone thought was going to happen but in the end the exact opposite happened.
So I think the answer is "At first"