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【单选题】
Which of the following best explains why a type 3 filter was selected for experiments 2 and 3?A.
The frequency response varied more widely when filter type 3 was used than when either Filter type 1 or Filter type 2 was used.
B.
Filter type 3 contains a ground and was therefore the safest of the three types of filters to experiment with.
C.
Filter type 3 is the only one among the three that contains an inductor.
D.
Input voltage could be more easily regulated using a type 3 filter than using either a type 1 or type 2 filter.
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