Which of the Following Is True Concerning the Use of Endodontic

Multiple Choice

Which of the following is true concerning the use of endodontic files and reamers in dentistry?

A) Rotary instruments are usually composed of stainless steel alloys.
B) Nickel-titanium files are far more flexible than stainless steel files.
C) Stainless steel files become more flexible as the diameter of the file increases.
D) Reamers are similar to files except that they have more twists in the metal and cut faster.