When each year an average of 500,000 immigrants entered the country the Home Office calculated that the fiscal benefit of this level of inward migration was 2.5 billion a year. This calculation was used extensively by the government of the day to support their immigration policies. The findings of the Home Office stood out against the findings of other western nations which found the benefits of large-scale inward migration to be so small as to be close to zero. The difference in the findings arose because the Home Office figure was based only on the effect of inward migration on the country's total Gross Domestic Product (GDP), while the other studies measured the effect on GDP per head. However, the Home Office calculation was obviously flawed, and they have since stopped using it, because immigration manifestly increases both the total GDP and the population. While the overall effect of inward migration may be negligible nationally in fiscal terms, the indigenous low paid and low skilled stand to lose out because as a consequence of the inward migration they face greater competition for work. Some employers have much to gain from the improved supply of labour and savings made from not having to train young people.

Question: The authors intended meaning when he wrote However, the Home Office calculation was obviously flawed, and they have since stopped using it, because immigration manifestly increases both the total GDP and the population would bebetter served if instead of immigration he wrote inward migration.
Options:
A. true, B. false, C. uncertain
Answer: "A"