7. Economic justifications of large land grants to railroads include a. compensation for positive production externalities b. provision of a source of financing as railroads could sell the land or borrow against it c. increased value of the remaining government's land d. All of the above are economic justifications of the land grants. period 8. In class we said that population grew at an average rate of 5.7% per year during the colonial from 1610 to 1770. was the largest contributor to this growth. Additionally we found that colonial birth rates were than those in England and colonial death rates were than those in England. this population growth? a. immigration of free settlers; higher; lower babbon b. immigration of free settlers; lower; higher is boon to comodi c. natural increase; lower; higher bomora con d. natural increase; higher; lower tube to wala anomed