Scientist are studying the effects of different temperatures on the processing speed of the computer ship
a. the type of computer
b. the size of the computer
c. the temperature inside the computer
d. how long l it takes the computer to perform a complex calculation.

If the scientists are studying the effects of different temperatures on the processing speed of a computer chip then they would need to know the temperature inside the computer.  

However, your questions doesn't include the full question text, so I cannot be sure what answer you need.

If the question is what do they need to know to do this, the answer is C.
If the question is how could they measure this when they subject the computer to different temperatures, then the answer is D.

Its either a) or b),wind and water erosion gradually widen the canyon

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.