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Question

The reasoning process presented in lines 49-53
("As yet, not one of these large planets, some of which (50) are many times the mass of Jupiter has actually been seen through a telescope; we know about them indirectly through the gravitational effects they exert on their parent stars.")
is best described as ____________________________.

Inference based on an untested theory
Extrapolation from similar situations
Analysis of a single case by multiple observers
Hypothesis confirmed by direct observation
Comparison of theory with physical evidence

A

Inference based on an untested theory

B

Extrapolation from similar situations

C

Hypothesis confirmed by direct observation

D

Analysis of a single case by multiple observers

E

Comparison of theory with physical evidence

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Solution

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The seven alien planets which orbit other stars are not found through telescope but through a similar situation of deduction where their gravitational effects on parent stars are calculated, just like the planets of the solar system. Hence, Option B is correct.
The rest of the options are neither mentioned nor implied by the passage in relation to the given lines, hence they're incorrect.

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