Answer is A. Marco believes that cowboy boots are cool. He sees many people on the street wearing them and decides to buy a pair for himself.
Inductive reasoning is the opposite of deductive reasoning. On one side, deductive reasoning begins with a general statement or idea, then evaluates and analyses the chances to arrive to a logical conclusion. On the other, inductive reasoning creates wide generalizations based on particular observations. Basically, there is information, and then conclusions are made based on that information.
In the case of Marco, he makes a particular observation (many people wear boots on the street), and then arrives to a conclusion (he assumes that boots are cool), so he decides to go with that (he buys himself a pair of boots).
