Answer:
Selflessly
Firm
Hard
Calmly
Gracefully
Rapidly
Very well
Fast enough
Slowly
Very fast
Explanation:
The words which answer the question HOW in the sentences are mostly the adverbs which modifies the verbs.
The answers are listed above.
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.