The sentence "wasted government money" is the one that fits the best in the blank box.
The reason is that it is the only sentence with a negative meaning, and the sentence itself is giving a negative opinion about the political machines from the beginning.
All the other senteces have a positive connotation, and because of that, would not fit in the blank space.
To warn John Hancock and Samuel Adams of the movements of the British Army, which was beginning a march from Boston to Lexington, ostensibly to arrest Hancock and Adams and seize the weapons stored in Concord.
