The survey is not only done by small number of people but that also done by incumbent candidates only, which means the result of the survey is not authentic and genuine.
Problems in Survey
The major problem in the survey is that the respondents of the survey are self selected and thus it is not sure you will be getting genuine results.
Inflexible design of the survey is also an issue because of which a lot of people can drop from it and sometimes people do not genuinely answer the survey which affects the results.
It put the British in great debt and the British 'punished' the colonists by greatly increasing their taxes and put many cruel laws up like the Intolerable Acts to help pay these things off
General Lee assumed that the Union is totally composed of cavalry only. He commenced an attack to advance through the Union forces. However the Union was backed by two corps of infantry. This is the reason why General Lee surrendered.