Answer:
A <u>customs union</u> is an intermediate step in the transition from a free trade area to a common market.
 
        
             
        
        
        
Answer:D - system analysis
Explanation: The system analysis stage in the System Development Life Cycle is on of the most important step. Here the security of the system is analysed to test if it will perform the function accurately without security bridge.
At this state, the security activity of the system is tested.
 
        
             
        
        
        
Answer:
C
Explanation:
They sell shares at a price to investors. They then use these funds to help grow their business and in turn pay dividends to shareholders 
 
        
             
        
        
        
Answer:
The advertiser should optimize the Clicks metric
Explanation:
Remember, we are told that the products are complex and require more detailed explanation than possible in the ads, so it implies improving the clicks metric (number of clicks per user) allows the advertiser to understand whether the users are interested in the ad or web page so as to adjust strategy accordingly.