Correct Answer: ABCDThere are several reasons that could explain why the sales rep is experiencing this issue. First, if the organization-wide defaults for opportunities are set to Private, the sales rep would only be able to edit opportunities they own, not those owned by others, even if those opportunities are associated with accounts they own. Next, opportunity visibility settings can allow view access to opportunities owned by others and associated with accounts owned by the sales rep, but not necessarily edit access. Finally, it is possible that some opportunities associated with the sales rep's account are owned by other users, which would prevent the sales rep from editing those opportunities.