Need help with question no idea how to answer

Which of the following sentences is correct? A great disadvantage of the rule of first possession is that it creates an incentive for some people to pre-empt others by making socially inefficient investments to obtain ownership of property. A great disadvantage of the rule of first possession is that it creates an incentive for some people to invest in resource until the marginal cost equals the marginal increase in productive value. A great disadvantage of the rule of first possession is that it is difficult to apply as it is difficult to establish definite boundaries of fugitive properties. A great advantage of the rule of first possession is that it creates an incentive for some people to invest in resource until the marginal cost equals the marginal increase in productive value. A great advantage of the rule of first possession is that it creates an incentive for some people to pre-empt others by making socially efficient investments to obtain ownership of property