Final answer:
The inside diameter of an 8mm coring reamer is likely 8mm, since this measurement refers to the size of the finished hole it is meant to create.
Step-by-step explanation:
The question asks about the inside diameter of an 8mm coring reamer. In machining, a coring reamer is used to finish a pre-drilled hole to a particular diameter. The "8mm" measurement typically refers to the size of the finished hole, which means the coring reamer's inside diameter is likely to be very close to this size, to perform its function correctly.
Therefore, the answer would be B. 8mm, assuming a nominal size with no additional over-size for clearance or under-size for interference fits.