Which of the following is NOT a source of revenue for cable system operators?

An argument from signs is one in which

a) a symbol for an idea explains the idea itself b) both sides of an argument are present c) the existence or occurrence of one thing meansthat something else exists or will occur d) a premise or conclusion is unstated

You can think of a schema as a mental "box" or "filing cabinet" where you classify, categorize, and file concepts

Indicate whether this statement is true or false.