Answer:
A. The client installed a new security system to protect the building
Step-by-step explanation:
The client is experiencing slow down in sales is an example of qualitative materiality factor as it can lead to misstatement. Sales turnover and payment, Percentage (%) of expenses to income and Percentage (%) of inventory to assets are all example of quantitative materiality factor. Whereas installation of new security system is not material which could lead to misstatement.