Just my two cents here. GMAT questions and their choices will NEVER be this vague. I suggest you guys stop doing these mutated third party problems and stick to the official questions.
In addition.
This is an inference question which means you CANNOT ADD INFORMATION to what is already provided. There is absolutely NO mention of OTHER INSTRUCTION METHODS (PLURAL). A and B are being discussed. How the **** can you ASSUME ANYTHING ABOUT C THROUGH Z on an INFERENCE QUESTION?
INFERENCE MEANS READING
...
In addition.
This is an inference question which means you CANNOT ADD INFORMATION to what is already provided. There is absolutely NO mention of OTHER INSTRUCTION METHODS (PLURAL). A and B are being discussed. How the **** can you ASSUME ANYTHING ABOUT C THROUGH Z on an INFERENCE QUESTION?
INFERENCE MEANS READING
...




