Can we have discussion on A vs B?
How the present perfect distorts the sentence?
If the Metropolitan Museum of Art had not decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints that have made up its Picasso collection, some truths and questions about the most important figure of 20th century Western art might not have been aired.
A) If the Metropolitan Museum of Art
had not decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints
that have made up its Picasso collection
B) If the Metropolitan Museum of Art
had not decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints
that make up its Picasso collection
C) If the Metropolitan Museum of Art
would not have decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints,
that make up its Picasso collection
D)If the Metropolitan Museum of Art
would not have decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints
that have made up its Picasso collection
E) If the Metropolitan Museum of Art
had decided to display together the 34 paintings, 58 works on paper, two sculptures and sundry items including prints,
making up its Picasso collection Here,
I was also confused between
would not have decided and
had not decided. (It will help if anyone can clarify this.) So, I sought for other errors. Sentence has If X, Y construction.
I would shorten the sentence by skipping the modifiers for a moment as below.
If the Museum had not decided X, Y and Z, some truths and questions might not have been aired. Correct.
To discuss between A and B, The confusion lies between simple present sentence Or simple perfect tense.
A uses
prints that have made up its Picasso collection.
B uses
prints that make up its Picasso collectionIt is the fact that is true not only in past but also in present. Present perfect used for actions completed in the past. So, Usage of simple present tense is correct one.