Discussion
The frequency of a phase shift oscillator :
Answer: C
The frequency of a phase shift oscillator depends primarily on R and C only.
The passage gives this as its example: the frequency of a phase shift oscillator primarily depends on R and C and other parameters do not affect it too much. The resistors and capacitors of the phase-shifting network set the frequency at which the network supplies the required phase shift.
'Depends heavily on parasitic components' is the opposite of the passage. 'Decided by amplifier gain' is wrong because gain sets whether the oscillation is sustained, not the frequency, and the passage names R and C. 'Independent of temperature, current etc.' is the claim the passage makes for the tuned circuit oscillator, not the phase shift oscillator.
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