Final answer:
Harvey's theories were more likely to be correct because they were based on extensive dissection and observation, which is a fundamental aspect of the empirical scientific method. Option c) Harvey's theories were based on extensive dissection and observation is the correct answer.
Step-by-step explanation:
The sentence that explains why Harvey's theories were more likely to be correct than those of previous scientists is: c) Harvey's theories were based on extensive dissection and observation.
This approach is a hallmark of the empirical scientific method, where hypotheses are tested and refined based on direct evidence and experimentation, rather than speculation or alignment with prevailing beliefs. For instance, Galileo and Newton eventually understood gravity by challenging misconceptions and using empirical evidence, much like Harvey's approach to understanding the circulatory system.
Similarly, Darwin's theory of evolution, based on biological and geological observations, has withstood criticism over time, reflecting how scientific theories are bolstered by direct observation and evidence.