Answer:
a. all of the above
Explanation:
The computation of yield is shown below:
For October:
= Output of October Ă· Input of October
= 45000 Ă· 46000
= 0.98
For November:
= Output of November Ă· Input of November
= 56000 Ă· 64000
= 0.88 approx
By computing above, we concluded that the yield is deteriorating due to which the loss cause should be investigated