Step 1: Understanding staffing expenditure. 
  
Spending money on staffing, such as hiring and training employees, is considered an investment. Proper staffing is crucial for the long-term success of an organization. 
Step 2: Analyzing the options. 
  
(A) Wastage of money: Incorrect. Money spent on staffing is not a waste, as it contributes to the growth and success of the organization. 
  
(B) Investment: Correct. Money spent on staffing is considered an investment in human capital, which is essential for the organization's success. 
  
(C) Necessary: This option is partially correct but not as specific as (B). 
  
(D) None of these: Incorrect, as the correct answer is (B). 
Step 3: Conclusion. 
  
The correct answer is (B) Investment, as staffing costs are a vital investment in the future of the company.