The sentence that is an example of a faulty coordination is: The guitar is used in a lot of contemporary music, and the instrument probably originated in Spain during the 1500s. What makes this sentence's coordination faulty is that, the first part talks about guitars are used in contemporary music, but on the second clause, the topic became the history of the instrument. There is no coherence in the sentence.
A which is a direct object
Look into free education. Look into Apprenticeships and Traineeships. Look into how to get a grant.
They use primary-source quotations to show that enslaved people in Saint Domingue were willing to destroy property to gain their freedom.