Final answer:
In the word 'audiometry', the stressed syllable is 'Om', making option C the correct answer.
Step-by-step explanation:
When pronouncing the word audiometry, the emphasis is placed on the third syllable, 'Om'. Therefore, the correct answer is: C) Om.
Understanding the stress patterns in words is important for proper pronunciation. For example, in audiometry, the pattern is au-DI-om-e-try, where the 'DI' is a short, unstressed syllable and 'Om' is the emphasized, or stressed, syllable.