Context: The optimum format for a broadcast depends upon the type of videographic recording medium used and the image's characteristics. For best fidelity to the source the transmitted field ratio, lines, and frame rate should match those of the source.

Question: A broadcasts optimum format depends on what two things?
Answer: the type of videographic recording medium used and the image's characteristics

Question: For best fidelity to the source, what three things should match the source? 
Answer: transmitted field ratio, lines, and frame rate

Question: For best fidelity to the source, the transmitted field ratio, lines, and frame rate should match what? 
Answer: those of the source

Question: The type of videographic recording medium used and the image's characteristics determine what?
Answer: The optimum format for a broadcast

Question:  A broadcasts optimum format depends on what three things?
Answer: Unanswerable

Question: For best fidelity to the source, what five things should match the source?
Answer: Unanswerable

Question: For best fidelity to the source, the transmitted field ratio, lines, and frame rate should not match what?
Answer: Unanswerable

Question: The type of videographic recording medium didn't use and the image's characteristics determine what?
Answer: Unanswerable