Answer:
c. Give examples.
Step-by-step explanation:
Whenever anyone is asked "to show proof", that means (s)he was required to provide examples to show that what he/she is proposing is actually true. By providing or giving examples, it can validate the claim and prove it. So, when Anna was asked to show proof for how the "country's way of life" has improved by the "amendments", it meant that she has to give examples to show or support her argument/ claim and provide validation.