Is the Truth a Matter of Opionion

Socrates & Plato were critical of the Sophists who argued that truth is a matter of opinion. That is, the Sophists argued that with the exception of basic truths about the physical world, that all our beliefs are just a matter of convention and thus there are no objective truths. Are the Sophists correct? Are all our beliefs just a matter of subjective opinion so that there are no objective truths for most of our beliefs or are they wrong about this? Write an essay where you take a position on this issue.