One of the more environmentally dangerous agricultural approaches to creating new land for farming is

Two critical factors used to distinguish experimental designs from most nonexperimental designs are

A) randomization and equal numbers of participants. B) elimination of all confounds and randomization. C) control groups and randomization. D) sophisticated data analysis and control groups.

Since Democrats and Republicans in Congress are further apart today than they have been in the past, we might conclude that Congress is more __________

Fill in the blanks with correct word