The correct answer should be A) causes of volcanic eruptions. This <span>topic is both appropriate and narrow enough for a research paper on geology because it constitutes a specific subject wherein no complex research is needed. All the other choices require extraction of details in simpler discussion.</span>
The fourth one FactFinder
They ratified the constitution by state legistlatures voting and included a bill of rights to prevent the government from taking their rights away.
B. Operating systems! It manages hardware, software resources, and common services for computer programs.
