Answer:
C. $74.400
Explanation:
The computation of the insurance expense for the year 2018 is shown below:
Starting balance in Prepaid Insurance account  $48,400
Add: Insurance  during 2018             $68,000
Less: year-end balance of prepaid insurance    -$42,000
Insurance expense recorded for the 2018 year $74,400
Hence, the correct option is C. $74,400