The passage talks about using of soft power instead of force and compulsion upon the people.
<u>Explanation:</u>
Soft power is the ability to attract and co-opt, rather than coerce. In other words, soft power is the ability to shape the preferences of others through appeal and attraction. A defining feature of soft power is that it is non-coercive; the currency of soft power is culture, political values, and foreign policies.
Soft power is a concept developed by Joseph Nye of Harvard University to describe the ability to attract and co-opt rather than by coercion (hard power), using force or giving money as a means of persuasion. Soft power is the ability to shape the preferences of others through appeal and attraction.
"Has" is the correct answer. This is because your friend is the subject here and you don't need to include "along with her sisters". "Your friend" is the subject and a singular subject is a singular verb...