During the 1910s and the 1920s, the actualité film began to eclipse other types of movies

You receive the data output and realize that the information you gathered does not answer the question you set out to ask. What would be wrong with this dataset?

A) lacks reliability B) lacks validity C) lacks sampling D) lacks statistical significance E) lacks practical significance

When were the 45 rpm record and the 33? rpm record introduced?

a) 1965 b) 1984 c) 1948 d) 1945