A situation where propaganda could be dangerous would be a political leader using propaganda in order to incite violence or dangerous ideas into people's minds. One example of this would be Hitler, as he used propaganda in order to incite violence and the killing of the jews.
Propaganda can be used for good, however, if it is used in order to inspire people to help out their country. An example of this would be WWII, as people used propaganda and posters in order to inspire people to help out the war effort and to help out the soldiers in the fight against Germany. This was beneficial as it gathered more support for soldiers fighting in the war and helped out in the long run.
B. Cowboys, since all western movies mostly take place in Texas and Texas is known as a western place
First to spend more time with the family, second because that way we could do more things in the summer, and third because teachers need long vacations
Thesaurus is the tool where you can find synonyms for a word, and even antonyms.
Although you can find synonyms in a regular dictionary as well, thesauri are better when it comes to that.