Professor Perlman Was Interested in Comparing Two Textbooks to Determine

Professor Perlman was interested in comparing two textbooks to determine whether one used more sexist language than the other.Perlman counted the number of times a gender reference (ex: "he," "she," "chairman," etc.) appeared in each book.Perlman was doing

A) latent content coding.
B) manifest content coding.
C) quota sampling.
D) the ecological fallacy.
E) base counting.