from a band score 9 (the highest) IELTS essay:
'In conclusion, free university education is a must for any country that values equal rights and one that wishes to advance. The cost of free educ...'
Here 'one' refers to students I'm sure as the essay starts:
'(...) University education should be free as it will greatly benefit both individuals and society'.
So why is 'that' used for humans instead of 'who' ?