Answer:
Consider the following explanation
Step-by-step explanation:
The current account is related to changes in a country’s net international investment position. The term Net International Investment Position is used to refer to the difference between the value of foreign assets owned by the country’s residents and the value of the country’s assets owned by foreign residents. 
 
The net international investment position changes when there is deficits or surpluses in the current account, which imply, respectively, net international purchases or sales of assets. 
 
Therefore, ∆NIIP = CA 
 
NIIP2011 = NIIP2010 + CA2011 
 
NIIP2011 =1000+500= $1500 
 
Now, NIIP2012 = NIIP2011 + CA2012 
 
NIIP2012 = 1500+ (-2000)= -$500 
 
Similarly, NIIP2013 = NIIP2012 + CA2013 
 
NIIP2013 = -500+ 3000= $2500 
 
Therefore, NIIP2014 = NIIP2013 + CA2014 
 
NIIP2014 = 2500 +(-3000) = -$500 
 
So, the accounting value of Country A's Net International Investment Position at the beginning of 2015 is -$500.