Answer: In the book, Esperanza Rising, Esperanza was always very wealthy and her family owned a lot of land and servants. Electricity is a basic every day item she has access to. Isabel, on the other hand, worked as a servant in the fields. Isabel is not used to these things, and given the situation and the state Esperanza's family is in... Well, he's only trying to cheer her up.
I want to go to the concert, but I'm not sure if I will be able to make it.
This one uses correct comma usage to join two independent clauses, the comma goes before the coordinating conjunction (but).
The semicolon would only be used before the coordinating conjunction if in the first clause a comma was used. But that's not the case so the answer with the semicolon is thus incorrect.
