After Ivan ……reading, he put out the light.
I go for (C)
Some non-native teachers say, " When we use a time expression (e.g. after, as soon as, when) to say that one event happened after another, we can ONLY use the past perfect for the event that happened first and the past simple for the event that happened second if there is time interval between the two events, but if there is no time interval between the two successive events, ONLY the past simple tense is used in the two sentences " Is there any grammar reference that supports this notion?
I think that what they say is not accurate, is it?
I agree with you that (c) is the best option, though you might say that the perfect is redundant because the past/anterior meaning is conveyed by after .
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I agree with you that (c) is the best option, though you might say that the perfect is redundant because the past/anterior meaning is conveyed by after.