Charles X was overthrown in the 1830 July Revolution due to his repressive edicts that limited citizen rights, leading to widespread protests and his eventual ousting. Therefore, option B is correct.
Charles X was overthrown in the 1830 July Revolution primarily because he issued a series of edicts that significantly restrained the rights of citizens. Notably, he disenfranchised a large portion of the electorate and intensified censorship, which flew in the face of a society that was becoming increasingly literate and liberal. In reaction to these repressive measures, public outrage sparked widespread protests, leading to his ousting. The correct answer to the question is (b) He issued a series of edicts that restrained the rights of citizens.