A
An intransitive verb is a verb that does not need a direct object to complete its meaning. Run, sleep, travel, wonder and die, are some examples
The correct answer is A.
It is the only option which is completely objective because the author is just stating facts, without actually offering his or her personal opinions on the topic. The other options are rather biased - they show the author's personal feelings by using words such as amazing, should read, best idea, etc.
