Despite His Insights, Erasmus Darwin Came Up Short of a Full-Blown

Despite his insights, Erasmus Darwin came up short of a full-blown theory of evolution by natural selection because he

A) failed to understand the scope of geologic time.
B) rejected the work of Mendel, which quantified the genetic inheritance of traits from parents to offspring.
C) failed to connect the struggle for existence to the evolutionary changes that would result from such a struggle.
D) rejected Lamarck's theory of inheritance, which correctly explained how traits are passed on to offspring and contribute to increasing diversity.