Queuing theory had its beginning in the research work of

Which of these is a common difficulty that traders face when exporting goods or services to other countries?

a) Most firms do not receive any significant assistance from the governments. b) Firms often face aggressive competition from smaller firms. c) Many customers require face-to-face negotiations on their home turf. d) Most global markets are saturated and present limited growth opportunities.

Positive cash flow from investing activities is typical of firms experiencing healthy growth

Indicate whether the statement is true or false.