Paraphrasing exercise.
A3:1 - Latin transformed into an international language among the Roman. The reason was not due to the people being outnumbered but because they were more influential.

A3:2 - Operating at higher temperature would increase productivity of the new reactors. Basic safety features would be inbuilt into the system rather than complicated operating systems. They are less accident-prone and are capable of mitigating an emergency situation on its own. Professionals believe that it needs to be more cost efficient to function. To convince the general residents; the new reactors will have to reduce radioactive by-products at the anti-terrorist infrastructures.

B3: 1 - Income inequality is common in every country. Most of the data, that are focused on the quality of life of people, collected by the sociologist are from the World Bank and the United Nation.

B3: 2 - There is a co-relation between the language and the speakers, rather than the number of people who speaks it. An example is Latin. The Romans were simply more powerful.  However, Latin remained as the international language, even after the Romans fell due to new type of influence.

C1. believe, imply, claim, mention, suggest, propose

C2. Lester (1976) asserts that students are overusing quotations in their research papers. He believes that this is due to overuse direct quotations in taking notes. He suggests in order to minimize quote use, students should reduce the use of quotations when taking notes.

The first half of the year proves to be profitable. According to department reports, there is twenty percent cost cuts and sales have risen five percent. However, most department heads believe that profit will go down in the second half of the year.