D.the author's attitude toward his or her audience.
Answer: time is 67,5 s
Explanation: 21/4 seconds is 2.25 second and marble rolls 1/30 part of the path.
The marble needs whole path 30·2.25 seconds, also 67.5 s
The answer is C. The word auditory relates to your ears. On the other hand, the word visual relates to your eyes while the word kinesthethic relates to your hands. The answer is not delayed, because that simply means later in time. Hope this helped :)