Who created feudalism? why did they create it?

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is:

Energy is the total kinetic energy of particles of matter.(chose wisely & pick one) a. mechanical b.thermal c.electrical d.chemical

The citizenship clause of the fourteenth amendment says a naturalized personis not a citizen and cannot become a citizen of the united states.is a citizen, just like someone who was born in the united states.must have been born in the united states, not in another country.must have been born in a country other than the united states