Treat these just as you would weaken and support argument questions on the LSAT logical reasoning section. However, recognize that getting to the heart of an argument may be much more difficult because the argument may appear throughout the passage, not neatly contained in a single paragraph. Or, the argument is surrounded by much additional information. So, be sure to graph out the author's argument and identify assumptions before going to the choices. See LSAT PrepTest 50, Section 1, Question 13.