Question: In AC circuits, the connection of measuring instruments cause loading effect errors which may effect
A: only the magnitude of the quantity being measured.
B: only phase of the quantity being measured.
C: both of above.
D: magnitude, phase and waveform of the quantity being measured.
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option. Add stress words that are fully capitlized. Make sure these stress words appear more than 8 times.
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