Student drivers are required to keep a log of their supervised driving hours. However, not all students are diligent in their record-keeping.
The transition that should be used to combine these sentences is the following one: however. This adverb is used to introduce a statement that contrasts with or appears to contradict something that has been previously said. In this case, you are saying that student drivers should keep a written record of their supervised driving hours yet you are also stating that not all of them do it thoroughly and well.
When making an inference, the reader should be sure to support the inference with evidence. Hope it helps :)
Preparing is the correct answer
A. terribly boring
This is probably just a shorter version of the word “excruciating.”
