Proofread this persuasive passage on the importance of travel. Which two types of errors does it contain?

Travel is essential for our mental development. A recent study conducted by psychology professors found that regular travelers tend to be more open-minded than those who don’t travel regularly. It stated that travel introducted others to vast cultures, which helped them them adopt a more tolerant attitude. Various studies and surveys conducted over time have also proved that regular travel boosts one’s self-confidence and self-relience.



A.spelling errors



B.incorrect comma usage



C.doubling of words



D.faulty use of apostrophe

Must pick 1 or 2 anwers