Answer: D is using deductive reasoning,
Explanation: deductive reasoning is when you figure something out using logic and using the information you already have, without asking someone.
I’d say why could mean another word for purpose
The correct answer is true
Lots of practice dedication motivation and lots of study
I would say A
this is because it is formed more properly, it gives the best reason out of the options, and includes a thorough fact.
hope this helps