One, Because it is written in old English. Secondly, Shakespeare invented many words which he used in his plays and the exact definitions are not known. The majority of the terms used are from hundreds upon hundreds of years ago and the 21st CE uses modern English. I don't think Shakespeare would know what "Lit" and "Fleek" would mean if he were to come back.
Answer: C, By practicing his speech in front of a mock audience.
Explanation: Once he gets used to the mock audience, Jason will be able to say his speech in front of big crowds.