broall
fmik7894
Archeologists speculated for decades about why the Anasazi had moved from Chaco Canyon to an unknown location at the time when their culture appears to have been at the peak of its evolution.
a. speculated for decades about why the Anasazi had moved from Chaco Canyon to an unknown location at the time when their culture appears to have been
b. speculate for decades about why the Anasazi moved from Chaco Canyon to an unknown location at the time when their culture appeared
c. speculate for decades about why the Anasazi had moved from Chaco Canyon to an unknown location at the time when their culture appeared to have been
d. have speculated for decades about why the Anasazi had moved from Chaco Canyon to an unknown location at the time when their culture appeared
e. have speculated for decades about why the Anasazi moved from Chaco Canyon to an unknown location at the time when their culture appears to have been
"speculated for decades": "for" here prefers perfect tense. Hence eliminate A, B, C/
"had moved" agrees with "by the time". The adverb here is "at the time", so "had moved" is incorrect. "moved" is prefered.
Also, "appear at the peak of" makes the sentence awkward. "appeares to have been" correctly refers to the past. E is the correct answer.
Hey Broall,
I eliminated answer choices with "had moved" because there is no "past of the past" and past event to refer to.
Both the following events:
1. Anasazi moved from CC to somewhere else
2. Their culture was at the peak of evolution
happened at the same time. Hence, we do not need past participle.
However, IMO "have been" must be used only when the effects of the event still persists today. Anasazi culture was at its peak in the past. Hence, simple past would have sufficed here.