The answer would be A. cheating, because you always have to show your work, so the teachers know you understand it, and didn't just take it from some website or book without fully understanding it. Hope this helps, and good luck!
Answer:
It has to do with voicing assimilation (voiced sounds vs, unvoiced sounds at the end of the word stem.) before the suffix is added.
Explanation:
Ex....
'P' is a voiced consonant (with your hand in front of your mouth, you feel a puff of air on your hand), so it's phonologically easier (more natural) to say a '-t' sound immediately afterward.
'N,' in contrast has no puff of air, so it's a voiceless sound.
