Robot satellites relay important communications and identify weather patterns, because the satellites can be repaid only in orbit, astronauts are needed to repair them. Without repairs, the satellites would eventually malfunction. Therefore, space flights carring astronauts must continue. Which of the following, if true, would most seriously weaken the argument above?

A Satellites falling from orbit because of malfunctions burn in the atmosphere.

B Although satellites are indispensable in the identification of weather patterns, weather forecasters also make some use computer projections identify weather patterns.

C The government, responding to public pressure, has decided to cut the budget for space flights and put more money into social welfare programs.

D Technical obsolescence of robot satellite makes repairing them more costly and less practical than sending new, improved satellites into orbit.

Solution

Correct Answer: Option D

Solution

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