In recent years, vaccines have come under scrutiny for possibly causing autism and other potentially serious side effects. Even though those concerns have been proven false, and the benefits of vaccines outweigh their risks, the rate of vaccines is declining, which is affecting herd immunity. Which of the following statements about herd immunity is correct? A. Declining vaccination rates do not have an effect of herd immunity.
B. All individuals in the population will have to be immune to the infectious disease in order for herd immunity to be effective.
C. Herd immunity protects individuals that are not immune, because the number of susceptible individuals is greatly decreased.
D. Herd immunity is only effective for viral infectious diseases.

its d. you give me brainliest

levels of production can be increased by technology while holding labor and capital constant, because increased technology makes the production process more efficient. subsequently, the lras curve is almost a vertical line, that can shift to the right, with an increase in technology.

the relationship between the lras curve and the ppc is that both can make the economy could grow. the ppc achieves that when it shifts outward because of more resources or technological advances while the lras curve shifts if more resources are developed or if there are technological advances.

the lras curve is a vertical line at an output level that represents the number of goods and services a nation can produce over a sustained period using all of its productive resources as efficiently as possible with all of the current technology available to it.

the production possibilities frontier (ppf) is a graphical device that is used for economic analysis of production decisions because the ppf measures the maximum possible combinations of two goods that an economy is capable of producing with its currently available resources and technology.

answer; ///he could not explain why the continents drifted;