The correct answer is B) witness'. This is because A is the plural of witness and, if you take it out of contraction form, C is "witness is".
Answer:
It is widely believed that there are 100 organs; however, there is no universally standard definition of what constitutes an organ, and some tissue groups' status as one is debated. Since there is no single standard definition of what an organ is, the number of organs varies depending on how one defines an organ.
Answer:
To make the writing smoother
Explanation:
The purpose of transitions make the writer flow easier and allows the audience to be able to read the essay more easily. This allows them to focus on the argument at hand