You analyze and argument by breaking it down you set claims when you evaluate it
What’s sentence you need to know the answer?
D. The sentence contains a typo. "Past" is the wrong spelling. It should be "Passed"
1d) was designed (long time ago so past tense)
2d) Has been repaired (It is still going on the present, this year)
3c) Had discovered (He discovered America long time ago)
4a) To have worked (worked long ago when he was young)
Hope it helps!
