Use the Following to Answer the Question(s) Below

Multiple Choice

Use the following to answer the question(s) below.
Preparing wheat for use in bread and pasta products generally involves both milling and bleaching. A company that processes wheat is interested in determining the best combination of milling and bleaching that results in a desirable wheat product without sacrificing fibre content. They vary the milling time (short, medium and long) and bleaching (no bleaching and bleaching) and measure fibre content (gms/100 grams) of the resulting wheat product. The partial ANOVA results apply.
-Which of the following is true about this study?

A) It is an observational study.
B) It is a completely randomized design in one factor.
C) We use the one-way analysis of variance.
D) It is an experimental study.
E) This is a retrospective study.