If they have use it, it will assist the flow and structure of your essay.
Again use the terms "credibility", "credible argument", "credible", "supported" etc So structure it and think of it as an essay. Stick to your word limit, its words for a reason.
Again you could include this in the table in a new column.
Which ones you think are the most credible and why, support with historical evidence. On each assignment, the correspondence of raw marks to UMS is decided by setting grade boundaries, a process which involves consultation by subject experts and consideration of statistics, aiming to keep standards for each grade the same year on year.
A typical route is to study four subjects at AS level and then drop down to three at A2 level, although some students continue with their fourth subject.
Also you do not want to be penalised for writing too much.