Answer:
"Tackling the global shortfall in radiotherapy could save millions of lives and boost the economy of poorer countries: Investment in radiotherapy services could bring economic benefits of up to $365 billion in developing countries over the next 20 years." ScienceDaily.
<span>This best illustrates that danger of potential catastrophic result if certain facts, key factors, views are concealed in order to come up with a precise decision. I believe the NASA executive would have not given the decision to launch the space shuttle if he was properly informed.</span>
Answer:
The threat to internal validity most likely to account for this change is <u>History</u>.
Explanation:
To understad the threats to internal validity during this research, the element that has to be considerate this case is history. The event in time that occure during the experiment, was the rising of the price of gasoline per gallon. Since the research had to do with determining attitudes toward the use of alternative energy, this event of the rising of the gasoline price, is a factor that may affect the validity of the investigation. Since this can defenetly modify the real position or previews position of the subjects towards the use of alternative energy. This specific aspect definetly changes the pretests done by the researcher.
Corn is the standard expected answer though they grew many crops
Either C or D.....not so sure
