Edexcel Opportunity Cost Question

Hey!

So I've been going through some past papers, and have come across a question that asked for 2 external benefits of increasing education. For an answer I came up with:

1) more educated people are more employable -> less likely to commit crime -> better for the society;
2) better education (arguably) increases the cultural output of the society, so you get more artists, musicians, writers, etc. that are likely to produce works of art that will benefit the society

Now my question is this: are these acceptable examples of external benefits? In the mark scheme they brought more tangible examples of external benefits like increased revenues for companies and so on, so I'm a bit hesitant now about my understanding of external benefits and what are the best examples of those to use.

Thank you for the help!