Which statement would best account for the difference in cost?
O
A. Cows in New Zealand are more efficient at producing milk.
O
B. New Zealand farmers feed their cattle more expensive grain.
O
C. Milk in California is more concentrated than milk in New Zealand.
O
D. New Zealand farmers have access to larger areas of pastureland.

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.