D is certianly wrong
its the WA (worst awnser)
The first part has to modify "the architects"
so C and D are out
I thin E too
having known not needed as designed gives a past connotation
Since they knew that seniors are apt to injury, the architect of the retirement home designed its staircases with secure railings.
(B) Having known that seniors are apt to injury,
(C) Seniors being apt to injury,
(D) Since seniors are known to be apt to injury,
(E) Knowing that seniors are apt to injury,
SPOILER: Official Answer is D but for E is more correct...
Why should E be the case ?
knowing ....(isnt reflecting present tense...maybe present perfect)..?
I will go with D
I was stuck between B and D.
But D reads as "Since ...x happens, architects did Y." Somehow doesnt sounds right its like simple present and simple past togeather...maybe because of Since. Lets rephrase it "Since the highways are jammed in the mornings, we took service road to office yesterday". This example is simple present and simple past. Nothing wrong with it is'nt it ? .. So I guess D is correct.
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