Consider the following statements:

i. A capacity expansion (increasing output rate) of an operation just before a bottleneck will improve the output of the process.

ii. An investment to increase the output rate is always justified if it expands the capacity of the bottleneck operation.

Which of the above statements is (are) correct?

A. (i) only

B. (ii) only

C. (i) and (ii)

D. None of the above