Well, a author has many types of styles, but it all depends on what author you are talking about.
The correct answer is A. reliable.
The writer was 'an authoritative source' because of her degrees, guest appearances, etc. Thus, she was a source you could rely on, she was reliable, given that she had experience to back her ideas up. Therefore A is the only correct answer.
Answer:
B. because it travels at a speed beyond Mach 5
Explanation:
according to NASA it has mach of 9.6
Answer:
B. a person who helps another commit a crime
