Which sources would be most useful in exploring the issue of higher education costs? plans of action
graphs and charts
personal stories
opening statements
past social policies

The first two alternatives are correct.

Every sectoral policy requires the secretariat that commands it a plan of action. In the case of education, a plan of action to improve the conditions of schools, the qualification of teachers and the use of education, etc. Of course, all of this has a cost, it is budgeted, so analyzing a plan of action of success or failure helps in the decision of the guidelines.

Charts and tables are technical analysis tools that compile data and information providing reliable statistics about reality. Statistics on the education sector are vast, so they are an essential tool for analyzing the costs of higher education.

Explanation:

answer; the correct answer to the above statement is to increase the production of milk in a herd of milk cows, the highest producing cows were chosen as the mother;