Because he was very curious to find the answer to his questions
Answer:B: the valve of promise
Affect - someone causing something.
Effect - the result of what was caused.
EX: Destroying trees negatively affects the wildlife.
EX: The effect that destroying trees has on wildlife is negative.
Depends on how major or minor the errors are. If the errors are due to lack of knowledge then it isn't a sign of progress but if less errors are being made and they are small ones progress may be shown.