If you are familiar with Robert Gordan and could answer this that would be greatly appreciated

Which of the following describes a point of disagreement between Robert Gordon and his critics, regarding Gordon's prediction of long-run decline in U.S. growth?

a. Gordon argues that future technological innovations are unlikely to be as transformative as those of the 19th and early 20th centuries.His critics disagree, citing the potential of innovations such as artificial intelligence.

b. Gordon's critics dispute his prediction that population growth will slow and the population will become older, on average, than it is today.

c. Gordon argues that automation will make 'learning by doing' more important to productivity growth. His critics disagree, citing shipbuilding during WWII, for instance.

d. Gordon argues that colonizing other planets won't help growth on Earth, because high-skilled workers will disproportionately leave

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