Which of these methods can be used to extract natural gas? 1. Underground mining
II. Tar sands extraction
III. Hydraulic fracturing

A. I, II, and III

B. III only

C. Il only

D. II and III only

Which statement best describes the relationship between observations and conclusions? a) observations are based on conclusions b) conclusions are based on observations c) observations and conclusions both depend on research d) neither conclusions nor observations depend on research.

The pattern of this wave changes between its beginning and end. what is true about the amplitude and wavelength of the wave when the pattern changes?

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria